diff --git a/index.css b/index.css
index b4bfcf69..70b5ea17 100644
--- a/index.css
+++ b/index.css
@@ -2011,15 +2011,6 @@ svg.button {
 	stroke-width: 1.4;
 }
 
-#_3dpreview {
-}
-
-#_3dpreviewEditor {
-	overflow-y: initial;
-	overflow-x: initial;
-	padding: 0px;
-}
-
 #legend {
 	cursor: move;
 	-moz-user-select: none;
diff --git a/index.html b/index.html
index 433af0b6..0a381905 100644
--- a/index.html
+++ b/index.html
@@ -1838,7 +1838,7 @@
           <button data-tip="Open template editor" id="applyTemplate" style="display: none">Template Editor</button>
           <button data-tip="Open Image Converter" id="convertImage" style="display: none">Image Converter</button>
           <button data-tip="Render heightmap data as a small monochrome image" id="heightmapPreview">Heightmap Preview</button>
-          <button data-tip="View heightmap data in 3D" id="heightmap3DView">3D View</button>
+          <button data-tip="View heightmap data in 3D" id="heightmap3DView">3D</button>
         </div>
 
         <div id="customizeOptions">
@@ -2587,12 +2587,7 @@
 
     </div>
 
-    <div id="_3dpreviewEditor" class="dialog stable" style="display: none">
-      <div id="_3dpreviewBody">
-      <div id="_3dpreviewContainer"></div>
-      </div>
-    </div>
-
+    <div id="_3dpreviewEditor" class="dialog stable" style="display: none; padding: 0px"></div>
 
     <div id="statesEditor" class="dialog stable" style="display: none">
       <div id="statesHeader" class="header">
@@ -3230,8 +3225,6 @@
     <input type="file" accept=".json" id="styleToLoad">
   </div>
 
-  <canvas id="renderCanvas"></canvas>
-
   <script src="libs/jquery-3.1.1.min.js"></script>
   <script src="libs/d3.min.js"></script>
   <script src="libs/priority-queue.min.js"></script>
@@ -3263,7 +3256,6 @@
   <script defer src="modules/relief-icons.js"></script>
   <script defer src="modules/ui/tools.js"></script>
   <script defer src="modules/ui/world-configurator.js"></script>
-  <script defer src="modules/ui/3dutils.js"></script>
   <script defer src="modules/ui/heightmap-editor.js"></script>
   <script defer src="modules/ui/states-editor.js"></script>
   <script defer src="modules/ui/provinces-editor.js"></script>
diff --git a/main.js b/main.js
index 8cb2f2f5..97639f46 100644
--- a/main.js
+++ b/main.js
@@ -42,7 +42,7 @@ let regions = viewbox.append("g").attr("id", "regions");
 let statesBody = regions.append("g").attr("id", "statesBody");
 let statesHalo = regions.append("g").attr("id", "statesHalo");
 let provs = viewbox.append("g").attr("id", "provs");
-let zones = viewbox.append("g").attr("id", "zones").attr("display", "none");
+let zones = viewbox.append("g").attr("id", "zones").style("display", "none");
 let borders = viewbox.append("g").attr("id", "borders");
 let stateBorders = borders.append("g").attr("id", "stateBorders");
 let provinceBorders = borders.append("g").attr("id", "provinceBorders");
@@ -52,16 +52,16 @@ let trails = routes.append("g").attr("id", "trails");
 let searoutes = routes.append("g").attr("id", "searoutes");
 let temperature = viewbox.append("g").attr("id", "temperature");
 let coastline = viewbox.append("g").attr("id", "coastline");
-let prec = viewbox.append("g").attr("id", "prec").attr("display", "none");
+let prec = viewbox.append("g").attr("id", "prec").style("display", "none");
 let population = viewbox.append("g").attr("id", "population");
 let labels = viewbox.append("g").attr("id", "labels");
 let icons = viewbox.append("g").attr("id", "icons");
 let burgIcons = icons.append("g").attr("id", "burgIcons");
 let anchors = icons.append("g").attr("id", "anchors");
-let markers = viewbox.append("g").attr("id", "markers").attr("display", "none");
+let markers = viewbox.append("g").attr("id", "markers").style("display", "none");
 let fogging = viewbox.append("g").attr("id", "fogging-cont").attr("mask", "url(#fog)")
-  .append("g").attr("id", "fogging").attr("display", "none");
-let ruler = viewbox.append("g").attr("id", "ruler").attr("display", "none");
+  .append("g").attr("id", "fogging").style("display", "none");
+let ruler = viewbox.append("g").attr("id", "ruler").style("display", "none");
 let debug = viewbox.append("g").attr("id", "debug");
 
 // lake and coast groups
diff --git a/modules/save-and-load.js b/modules/save-and-load.js
index f2250be1..84e2efde 100644
--- a/modules/save-and-load.js
+++ b/modules/save-and-load.js
@@ -1,115 +1,145 @@
 // Functions to save and load the map
 "use strict";
 
-// download map as SVG or PNG file
-function saveAsImage(type) {
-  console.time("saveAsImage");
+// download map as SVG
+async function saveSVG() {
+  console.time("saveSVG");
+  const url = await getMapURL("svg");
+  const link = document.createElement("a");
+  link.download = getFileName() + ".svg";
+  link.href = url;
+  document.body.appendChild(link);
+  link.click();
 
-  // clone svg
-  const cloneEl = document.getElementById("map").cloneNode(true);
+  tip(`${link.download} is saved. Open "Downloads" screen (crtl + J) to check`, true, "warning", 5000);
+  console.timeEnd("saveSVG");
+}
+
+// download map as PNG
+async function savePNG() {
+  console.time("savePNG");
+  const url = await getMapURL("png");
+
+  const link = document.createElement("a");
+  const canvas = document.createElement("canvas");
+  const ctx = canvas.getContext("2d");
+  canvas.width = svgWidth * pngResolutionInput.value;
+  canvas.height = svgHeight * pngResolutionInput.value;
+  const img = new Image();
+  img.src = url;
+
+  img.onload = function() {
+    ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
+    link.download = getFileName() + ".png";
+    canvas.toBlob(function(blob) {
+        link.href = window.URL.createObjectURL(blob);
+        document.body.appendChild(link);
+        link.click();
+        window.setTimeout(function() {
+          canvas.remove();
+          window.URL.revokeObjectURL(link.href);
+          tip(`${link.download} is saved. Open "Downloads" screen (crtl + J) to check`, true, "warning", 5000);
+        }, 1000);
+    });
+  }
+
+  console.timeEnd("savePNG");
+}
+
+// parse map svg to object url
+async function getMapURL(type) {
+  const cloneEl = document.getElementById("map").cloneNode(true); // clone svg
   cloneEl.id = "fantasyMap";
-  document.getElementsByTagName("body")[0].appendChild(cloneEl);
-  const clone = d3.select("#fantasyMap");
+  document.body.appendChild(cloneEl);
+  const clone = d3.select(cloneEl);
+  clone.select("#debug").remove();
 
-  if (type === "svg") clone.select("#viewbox").attr("transform", null); // reset transform to show whole map
+  const isFirefox = navigator.userAgent.toLowerCase().indexOf('firefox') > -1;
+  if (isFirefox && type === "mesh") clone.select("#oceanPattern").remove();
+  if (type !== "png") clone.select("#viewbox").attr("transform", null); // reset transform to show whole map
+  if (type === "svg") removeUnusedElements(clone);
+  if (type === "mesh") updateMeshCells(clone);
+  inlineStyle(clone);
 
-  // remove unused elements
-  if (!clone.select("#terrain").selectAll("use").size()) clone.select("#defs-relief").remove();
-  if (!clone.select("#prec").selectAll("circle").size()) clone.select("#prec").remove();
-  const removeEmptyGroups = function() {
-    let empty = 0;
+  const fontStyle = await GFontToDataURI(getFontsToLoad()); // load non-standard fonts
+  if (fontStyle) clone.select("defs").append("style").text(fontStyle.join('\n')); // add font to style
+
+  clone.append("metadata").text("<dc:format>image/svg+xml</dc:format>");
+  const serialized = (new XMLSerializer()).serializeToString(clone.node());
+  const svg_xml = `<?xml version="1.0" encoding="UTF-8" standalone="no"?>` + serialized;
+  clone.remove();
+  const blob = new Blob([svg_xml], {type: 'image/svg+xml;charset=utf-8'});
+  const url = window.URL.createObjectURL(blob);
+  window.setTimeout(() => window.URL.revokeObjectURL(url), 5000);
+  return url;
+}
+
+// remove hidden g elements and g elements without children to make downloaded svg smaller in size
+function removeUnusedElements(clone) {
+  if (!terrain.selectAll("use").size()) clone.select("#defs-relief").remove();
+  if (markers.style("display") === "none") clone.select("#defs-markers").remove();
+
+  for (let empty = 1; empty;) {
+    empty = 0;
     clone.selectAll("g").each(function() {
       if (!this.hasChildNodes() || this.style.display === "none") {empty++; this.remove();}
       if (this.hasAttribute("display") && this.style.display === "inline") this.removeAttribute("display");
     });
-    return empty;
   }
-  while(removeEmptyGroups()) {removeEmptyGroups();}
+}
 
-  // for each g element get inline style
+function updateMeshCells(clone) {
+  const data = renderOcean.checked ? grid.cells.i : grid.cells.i.filter(i => grid.cells.h[i] >= 20);
+  const scheme = getColorScheme();
+  clone.select("#heights").attr("filter", "url(#blur1)");
+  clone.select("#heights").selectAll("polygon").data(data).join("polygon").attr("points", d => getGridPolygon(d))
+    .attr("id", d => "cell"+d).attr("stroke", d => getColor(grid.cells.h[d], scheme));
+}
+
+// for each g element get inline style
+function inlineStyle(clone) {
   const emptyG = clone.append("g").node();
   const defaultStyles = window.getComputedStyle(emptyG);
-  clone.selectAll("g, #ruler > g > *, #scaleBar > text").each(function(d) {
+
+  clone.selectAll("g, #ruler > g > *, #scaleBar > text").each(function() {
     const compStyle = window.getComputedStyle(this);
     let style = "";
+
     for (let i=0; i < compStyle.length; i++) {
       const key = compStyle[i];
       const value = compStyle.getPropertyValue(key);
+
       // Firefox mask hack
       if (key === "mask-image" && value !== defaultStyles.getPropertyValue(key)) {
         style += "mask-image: url('#land');";
         continue;
       }
+
       if (key === "cursor") continue; // cursor should be default
       if (this.hasAttribute(key)) continue; // don't add style if there is the same attribute
       if (value === defaultStyles.getPropertyValue(key)) continue;
       style += key + ':' + value + ';';
     }
+
     if (style != "") this.setAttribute('style', style);
   });
+
   emptyG.remove();
-
-  // load fonts as dataURI so they will be available in downloaded svg/png
-  GFontToDataURI(getFontsToLoad()).then(cssRules => {
-    if (cssRules) clone.select("defs").append("style").text(cssRules.join('\n'));
-    clone.append("metadata").text("<dc:format>image/svg+xml</dc:format>");
-    const serialized = (new XMLSerializer()).serializeToString(clone.node());
-    const svg_xml = `<?xml version="1.0" encoding="UTF-8" standalone="no"?>` + serialized;
-    clone.remove();
-    const blob = new Blob([svg_xml], {type: 'image/svg+xml;charset=utf-8'});
-    const url = window.URL.createObjectURL(blob);
-    const link = document.createElement("a");
-
-    if (type === "png") {
-      const canvas = document.createElement("canvas");
-      const ctx = canvas.getContext("2d");
-      canvas.width = svgWidth * pngResolutionInput.value;
-      canvas.height = svgHeight * pngResolutionInput.value;
-      const img = new Image();
-      img.src = url;
-      img.onload = function() {
-        window.URL.revokeObjectURL(url);
-        ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
-        link.download = getFileName() + ".png";
-        canvas.toBlob(function(blob) {
-           link.href = window.URL.createObjectURL(blob);
-           document.body.appendChild(link);
-           link.click();
-           window.setTimeout(function() {
-             canvas.remove();
-             window.URL.revokeObjectURL(link.href);
-           }, 1000);
-        });
-      }
-    } else {
-      link.download = getFileName() + ".svg";
-      link.href = url;
-      document.body.appendChild(link);
-      link.click();
-      tip(`${link.download} is saved. Open "Downloads" screen (crtl + J) to check`, true, "warning");
-    }
-
-    window.setTimeout(function() {
-      window.URL.revokeObjectURL(url);
-      clearMainTip();
-    }, 3000);
-    console.timeEnd("saveAsImage");
-  });
 }
 
 // get non-standard fonts used for labels to fetch them from web
 function getFontsToLoad() {
-  const webSafe = ["Georgia", "Times+New+Roman", "Comic+Sans+MS", "Lucida+Sans+Unicode", "Courier+New", "Verdana", "Arial", "Impact"];
+  const webSafe = ["Georgia", "Times+New+Roman", "Comic+Sans+MS", "Lucida+Sans+Unicode", "Courier+New", "Verdana", "Arial", "Impact"]; // fonts to not fetch
 
   const fontsInUse = new Set(); // to store fonts currently in use
   labels.selectAll("g").each(function() {
+    if (!this.hasChildNodes()) return;
     const font = this.dataset.font;
-    if (!font) return;
-    if (webSafe.includes(font)) return; // do not fetch web-safe fonts
+    if (!font || webSafe.includes(font)) return;
     fontsInUse.add(font);
   });
   const legendFont = legend.attr("data-font");
-  if (!webSafe.includes(legendFont)) fontsInUse.add();
+  if (legend.node().hasChildNodes() && !webSafe.includes(legendFont)) fontsInUse.add(legendFont);
   const fonts = [...fontsInUse];
   return fonts.length ? "https://fonts.googleapis.com/css?family=" + fonts.join("|") : null;
 }
@@ -839,6 +869,11 @@ function parseLoadedData(data) {
             c.code = c.name.slice(0, 2);
           });
         }
+
+        // v 1.11 replaced "display" attribute by "display" style
+        viewbox.selectAll("g").each(function() {
+          if (this.hasAttribute("display")) this.removeAttribute("display");
+        });
       }
 
     }()
diff --git a/modules/ui/3dpreview.js b/modules/ui/3dpreview.js
index a7134c99..09670900 100644
--- a/modules/ui/3dpreview.js
+++ b/modules/ui/3dpreview.js
@@ -1,105 +1,61 @@
+"use strict";
+
 // Define variables - these make it easy to work with from the console
-var _3dpreviewScale = 50;
-var _3dpreviewCamera = null;
-var _3dpreviewScene = null;
-var _3dpreviewRenderer = null;
-var _3danimationFrame = null;
-var _3dmaterial = null;
-var _3dtexture = null;
-var _3dmesh = null;
+let _3dpreviewScale = 70;
+let _3dpreviewCamera = null;
+let _3dpreviewScene = null;
+let _3dpreviewRenderer = null;
+let _3danimationFrame = null;
+let _3dmaterial = null;
+let _3dmesh = null;
 
 // Create a mesh from pixel data
-function addMesh(width, height, segmentsX, segmentsY) {
-  _3dgeometry = new THREE.PlaneGeometry(width, height, segmentsX-1, segmentsY-1);
-
-  _3dmaterial = new THREE.MeshBasicMaterial({
-    wireframe: false,
-  });
-
-  _3dtexture = new THREE.TextureLoader().load( getPreviewTexture(width, height) );
-//  _3dtexture.minFilter = THREE.LinearFilter;
-  _3dmaterial.map = _3dtexture;
-
-  var terrain = getHeightmap();
-
-  var l = _3dgeometry.vertices.length;
-
-  for (var i = 0; i < l; i++) // For each vertex
-  {
-    var terrainValue = terrain[i] / 255;
-    _3dgeometry.vertices[i].z = _3dgeometry.vertices[i].z + terrainValue * _3dpreviewScale; 
-  }
-
+async function addMesh(width, height, segmentsX, segmentsY) {
+  const _3dgeometry = new THREE.PlaneGeometry(width, height, segmentsX-1, segmentsY-1);
+  const _3dmaterial = new THREE.MeshBasicMaterial({wireframe: false});
+  const url = await getMapURL("mesh");
+  _3dmaterial.map = new THREE.TextureLoader().load(url);
+  _3dgeometry.vertices.forEach((v, i) => v.z = getMeshHeight(i));
   _3dmesh = new THREE.Mesh(_3dgeometry, _3dmaterial);
   _3dmesh.rotation.x = -Math.PI / 2;
   _3dpreviewScene.add(_3dmesh);
 }
 
+function getMeshHeight(i) {
+  const h = grid.cells.h[i];
+  return h < 20 ? 0 : (h - 18) / 82 * _3dpreviewScale;
+}
+
 // Function to render scene and camera
 function render() {
   _3danimationFrame = requestAnimationFrame(render);
   _3dpreviewRenderer.render(_3dpreviewScene, _3dpreviewCamera);
 }
 
-function check3dCamera(canvas) {
-// workaround to fix camera problems
-  var resetCamera = 0;
-  if (!_3dpreviewCamera) {
-    resetCamera = 1;
-  } else if (isNaN(_3dpreviewCamera.position.x)) {
-    _3dpreviewCamera = null;
-    resetCamera = 1;
-  }
-
-  if (resetCamera) {
-    _3dpreviewCamera = new THREE.PerspectiveCamera(70, canvas.width / canvas.height, 0.1, 10000); //Field-of-View, Aspect Ratio, Near Render, Far Render
-    _3dpreviewCamera.position.z = 800;
-    _3dpreviewCamera.position.y = 1000;
-  }
-}
-
-function removeMesh() {
-  _3dpreviewScene.remove(_3dmesh);
-  _3dmesh.geometry.dispose();
-  _3dmesh.material.dispose();
-  _3dmesh = undefined;
-  _3dgeometry = undefined;
-  _3dmaterial = undefined;
-  _3dtexture = undefined;
-}
-
 function start3dpreview(canvas) {
   _3dpreviewScene = new THREE.Scene();
-
-  check3dCamera(canvas);
-
-  _3dpreviewRenderer = new THREE.WebGLRenderer({ canvas: canvas });
-  _3dpreviewControls = new THREE.OrbitControls( _3dpreviewCamera, _3dpreviewRenderer.domElement );
+  _3dpreviewCamera = new THREE.PerspectiveCamera(70, canvas.width / canvas.height, 0.1, 100000);
+  _3dpreviewCamera.position.x = 0;
+  _3dpreviewCamera.position.z = 350;
+  _3dpreviewCamera.position.y = 285;
+  _3dpreviewRenderer = new THREE.WebGLRenderer({canvas});
+  new THREE.OrbitControls(_3dpreviewCamera, _3dpreviewRenderer.domElement);
   _3dpreviewRenderer.setSize(canvas.width, canvas.height);
-
   addMesh(graphWidth, graphHeight, grid.cellsX, grid.cellsY);
-
-  document.body.appendChild(_3dpreviewRenderer.domElement);
-
   _3danimationFrame = requestAnimationFrame(render);
 }
 
-function stop3dpreview() {
-  if (_3danimationFrame) {
-    cancelAnimationFrame(_3danimationFrame);
-    _3danimationFrame = null;
-  }
-  removeMesh();
-
-  _3dpreviewScene = null;
-  _3dpreviewRenderer = null;
-  _3dpreviewControls = null;
-}
-
 function update3dpreview(canvas) {
-  removeMesh();
-  check3dCamera(canvas);
-
+  _3dpreviewScene.remove(_3dmesh);
   _3dpreviewRenderer.setSize(canvas.width, canvas.height);
   addMesh(graphWidth, graphHeight, grid.cellsX, grid.cellsY);
 }
+
+function stop3dpreview() {
+  cancelAnimationFrame(_3danimationFrame);
+  _3danimationFrame = null;
+  _3dmesh = undefined;
+  _3dmaterial = undefined;
+  _3dpreviewScene = null;
+  _3dpreviewRenderer = null;
+}
\ No newline at end of file
diff --git a/modules/ui/3dutils.js b/modules/ui/3dutils.js
deleted file mode 100644
index 6fce31d5..00000000
--- a/modules/ui/3dutils.js
+++ /dev/null
@@ -1,150 +0,0 @@
-var _3dheightMapExponent = null;
-var _3dmaxHeight = null;
-var _3dcolorLookup = null;
-
-function _2dto1d(source) {
-  var r = [];
-
-  var w = source[0].length;
-  var h = source.length;
-
-  var i=0;
-  for (var y=0; y < h; y++) {
-    for (var x=0; x < w; x++) { 
-      r[i] = source[y][x];
-      i++;
-    }
-  }
-
-  return r;
-}
-
-function _1dto2d(source, w, h) {
-
-  var r = [];
-
-  var i=0;
-  for (var y=0; y < h; y++) {
-    r[y] = [];
-    for (var x=0; x < w; x++) {
-      r[y][x] = source[i];
-      i++;
-    }
-  }
-
-  return r;
-}
-
-function getSVGImage(type, width, height) {
-  // clone svg
-  const cloneEl = document.getElementById("map").cloneNode(true);
-  cloneEl.id = "fantasyMap";
-  document.getElementsByTagName("body")[0].appendChild(cloneEl);
-  const clone = d3.select("#fantasyMap");
-
-  if (type === "svg") {
-    clone.select("#viewbox").attr("transform", null); // reset transform to show whole map
-  }
-
-  clone.attr("width", width).attr("height", height);
-
-  // remove unused elements
-  if (!clone.select("#terrain").selectAll("use").size()) clone.select("#defs-relief").remove();
-  if (!clone.select("#prec").selectAll("circle").size()) clone.select("#prec").remove();
-  if (!clone.select("#scaleBar").selectAll("use").size()) clone.select("#scaleBar").remove();
-
-  // default to water - on Firefox, ocean pattern appears as alternating blocks of ocean and water pattern
-  const isFirefox = navigator.userAgent.toLowerCase().indexOf('firefox') > -1;
-  if (isFirefox) {
-    if (!clone.select("#oceanPattern").selectAll("use").size()) clone.select("#oceanPattern").remove();
-  }
-
-  const removeEmptyGroups = function() {
-    let empty = 0;
-    clone.selectAll("g").each(function() {
-      if (!this.hasChildNodes() || this.style.display === "none") {empty++; this.remove();}
-      if (this.hasAttribute("display") && this.style.display === "inline") this.removeAttribute("display");
-    });
-    return empty;
-  }
-  while(removeEmptyGroups()) {removeEmptyGroups();}
-
-  // for each g element get inline style
-  const emptyG = clone.append("g").node();
-  const defaultStyles = window.getComputedStyle(emptyG);
-  clone.selectAll("g, #ruler > g > *, #scaleBar > text").each(function(d) {
-    const compStyle = window.getComputedStyle(this);
-    let style = "";
-    for (let i=0; i < compStyle.length; i++) {
-      const key = compStyle[i];
-      const value = compStyle.getPropertyValue(key);
-      // Firefox mask hack
-      if (key === "mask-image" && value !== defaultStyles.getPropertyValue(key)) {
-        style += "mask-image: url('#land');";
-        continue;
-      }    
-      if (key === "cursor") continue; // cursor should be default
-      if (this.hasAttribute(key)) continue; // don't add style if there is the same attribute
-      if (value === defaultStyles.getPropertyValue(key)) continue;
-      style += key + ':' + value + ';';
-    }
-    if (style != "") this.setAttribute('style', style);
-  });
-  emptyG.remove();
-
-  // load fonts as dataURI so they will be available in downloaded svg/png
-  const svg_xml = (new XMLSerializer()).serializeToString(clone.node());
-  clone.remove();
-  const blob = new Blob([svg_xml], {type: 'image/svg+xml;charset=utf-8'});
-  const url = window.URL.createObjectURL(blob);
-  return url;
-}
-
-function getHeightmap() {
-  var mh = 0;
-  grid.cells.h.forEach((height, i) => {
-    h = grid.cells.h[i];
-
-    if (h > mh) mh = h;
-  });
-  if (mh > 82) { mh = 82; }
-
-  _3dheightMapExponent = heightExponentInput.value;
-//  _3dmaxHeight = Math.pow(mh, _3dheightMapExponent);
-  _3dmaxHeight = Math.pow(82, _3dheightMapExponent);
-
-  var heightMap = [];
-  for (var y=0; y < grid.cellsY; y++) {
-    heightMap[y] = [];
-  }
-
-  var y = 0, x = 0;
-
-// convert height from map heights to a linear height
-  grid.cells.h.forEach((height, i) => {
-    h = grid.cells.h[i];
-
-    // add heightmap exponent
-    if (h >= 20) height = Math.pow(h - 18, _3dheightMapExponent);
-//    else if (h > 0) height = (h - 20) / h * 50;
-    else height = 0;
-
-    // get heightmap as a percentage
-    let v = (height / _3dmaxHeight);
-
-    // convert to 0-255
-    v = (v * 255);
-
-    heightMap[y][x] = Math.floor(v);
-    x++;
-    if (x >= grid.cellsX) { x = 0; y++ }
-  });
-
-  var hm = _2dto1d(heightMap);
-
-  return hm;
-}
-
-function getPreviewTexture(width, height) {
-  return getSVGImage("svg", width, height);
-}
diff --git a/modules/ui/editors.js b/modules/ui/editors.js
index 211a6e30..5cf9663e 100644
--- a/modules/ui/editors.js
+++ b/modules/ui/editors.js
@@ -70,20 +70,6 @@ function removeCircle() {
   if (document.getElementById("brushCircle")) document.getElementById("brushCircle").remove();
 }
 
-function hideCircle() {
-  let circle = document.getElementById("brushCircle");
-  if (circle) {
-    circle.style.display = "none";
-  }
-}
-
-function showCircle() {
-  let circle = document.getElementById("brushCircle");
-  if (circle) {
-    circle.style.display = "";
-  }
-}
-
 // get browser-defined fit-content
 function fitContent() {
   return !window.chrome ? "-moz-max-content" : "fit-content";
@@ -542,7 +528,7 @@ function changePickerSpace() {
 function unfog() {
   defs.select("#fog").selectAll("path").remove();
   fogging.selectAll("path").remove();
-  fogging.attr("display", "none");
+  fogging.style("display", "none");
 }
 
 function getFileName(dataType) {
diff --git a/modules/ui/general.js b/modules/ui/general.js
index c8589a67..e1b08f2b 100644
--- a/modules/ui/general.js
+++ b/modules/ui/general.js
@@ -285,6 +285,8 @@ document.addEventListener("keyup", event => {
   event.stopPropagation();
 
   const key = event.keyCode, ctrl = event.ctrlKey, shift = event.shiftKey, meta = event.metaKey;
+  const tdMode = document.getElementById("_3dpreview");
+
   if (key === 112) showInfo(); // "F1" to show info
   else if (key === 113) regeneratePrompt(); // "F2" for new map
   else if (key === 113) regeneratePrompt(); // "F2" for a new map
@@ -294,8 +296,8 @@ document.addEventListener("keyup", event => {
   else if (key === 27) {closeDialogs(); hideOptions();} // Escape to close all dialogs
   else if (key === 46) removeElementOnKey(); // "Delete" to remove the selected element
 
-  else if (ctrl && key === 80) saveAsImage("png"); // Ctrl + "P" to save as PNG
-  else if (ctrl && key === 83) saveAsImage("svg"); // Ctrl + "S" to save as SVG
+  else if (ctrl && key === 80) savePNG(); // Ctrl + "P" to save as PNG
+  else if (ctrl && key === 83) saveSVG(); // Ctrl + "S" to save as SVG
   else if (ctrl && key === 77) saveMap(); // Ctrl + "M" to save MAP file
   else if (ctrl && key === 71) saveGeoJSON(); // Ctrl + "G" to save as GeoJSON
   else if (ctrl && key === 85) mapToLoad.click(); // Ctrl + "U" to load MAP from URL
@@ -355,10 +357,10 @@ document.addEventListener("keyup", event => {
   else if (key === 187) toggleRulers(); // Equal (=) to toggle Rulers
   else if (key === 189) toggleScaleBar(); // Minus (-) to toggle Scale bar
 
-  else if (key === 37) zoom.translateBy(svg, 10, 0); // Left to scroll map left
-  else if (key === 39) zoom.translateBy(svg, -10, 0); // Right to scroll map right
-  else if (key === 38) zoom.translateBy(svg, 0, 10); // Up to scroll map up
-  else if (key === 40) zoom.translateBy(svg, 0, -10); // Up to scroll map up
+  else if (key === 37 && !tdMode) zoom.translateBy(svg, 10, 0); // Left to scroll map left
+  else if (key === 39 && !tdMode) zoom.translateBy(svg, -10, 0); // Right to scroll map right
+  else if (key === 38 && !tdMode) zoom.translateBy(svg, 0, 10); // Up to scroll map up
+  else if (key === 40 && !tdMode) zoom.translateBy(svg, 0, -10); // Up to scroll map up
   else if (key === 107 || key === 109) pressNumpadSign(key); // Numpad Plus/Minus to zoom map or change brush size
   else if (key === 48 || key === 96) resetZoom(1000); // 0 to reset zoom
   else if (key === 49 || key === 97) zoom.scaleTo(svg, 1); // 1 to zoom to 1
diff --git a/modules/ui/heightmap-editor.js b/modules/ui/heightmap-editor.js
index 3e11c4f7..e113995e 100644
--- a/modules/ui/heightmap-editor.js
+++ b/modules/ui/heightmap-editor.js
@@ -61,7 +61,7 @@ function editHeightmap() {
       undraw();
       changeOnlyLand.checked = false;
     } else if (type === "keep") {
-      viewbox.selectAll("#landmass, #lakes").attr("display", "none");
+      viewbox.selectAll("#landmass, #lakes").style("display", "none");
       changeOnlyLand.checked = true;
     } else if (type === "risk") {
       defs.selectAll("#land, #water").selectAll("path").remove();
@@ -95,19 +95,19 @@ function editHeightmap() {
     moveCircle(p[0], p[1], brushRadius.valueAsNumber, "#333");
   }
 
-// get user-friendly (real-world) height value from map data
-function getHeight(h) {
-  const unit = heightUnit.value;
-  let unitRatio = 3.281; // default calculations are in feet
-  if (unit === "m") unitRatio = 1; // if meter
-  else if (unit === "f") unitRatio = 0.5468; // if fathom
+  // get user-friendly (real-world) height value from map data
+  function getHeight(h) {
+    const unit = heightUnit.value;
+    let unitRatio = 3.281; // default calculations are in feet
+    if (unit === "m") unitRatio = 1; // if meter
+    else if (unit === "f") unitRatio = 0.5468; // if fathom
 
-  let height = -990;
-  if (h >= 20) height = Math.pow(h - 18, +heightExponentInput.value);
-  else if (h < 20 && h > 0) height = (h - 20) / h * 50;
+    let height = -990;
+    if (h >= 20) height = Math.pow(h - 18, +heightExponentInput.value);
+    else if (h < 20 && h > 0) height = (h - 20) / h * 50;
 
-  return rn(height * unitRatio) + " " + unit;
-}
+    return rn(height * unitRatio) + " " + unit;
+  }
 
   // Exit customization mode
   function finalizeHeightmap() {
@@ -127,7 +127,7 @@ function getHeight(h) {
 
     restartHistory();
     if (document.getElementById("preview")) document.getElementById("preview").remove();
-    if (document.getElementById("_3dpreview")) { toggleHeightmap3dView(); };
+    if (document.getElementById("_3dpreview")) toggleHeightmap3dView();
 
 
     const mode = heightmapEditMode.innerHTML;
@@ -189,7 +189,7 @@ function getHeight(h) {
   }
 
   function restoreKeptData() {
-    viewbox.selectAll("#landmass, #lakes").attr("display", null);
+    viewbox.selectAll("#landmass, #lakes").style("display", null);
     for (const i of pack.cells.i) {
       pack.cells.h[i] = grid.cells.h[pack.cells.g[i]];
     }
@@ -375,7 +375,6 @@ function getHeight(h) {
 
     mockHeightmap();
     updateHistory();
-    draw3dPreview();
   }
 
   // draw or update heightmap
@@ -413,10 +412,11 @@ function getHeight(h) {
 
     undo.disabled = templateUndo.disabled = edits.n <= 1;
     redo.disabled = templateRedo.disabled = true;
-    if (!noStat) updateStatistics();
-
-    if (document.getElementById("preview")) drawHeightmapPreview(); // update heightmap preview if opened
-    if (document.getElementById("_3dpreview")) draw3dPreview();     // update 3d heightmap preview if opened
+    if (!noStat) {
+      updateStatistics();
+      if (document.getElementById("preview")) drawHeightmapPreview(); // update heightmap preview if opened
+      if (document.getElementById("_3dpreview")) update3dpreview(_3dpreview); // update 3d heightmap preview if opened
+    }
   }
 
   // restoreHistory
@@ -430,7 +430,7 @@ function getHeight(h) {
     updateStatistics();
     
     if (document.getElementById("preview")) drawHeightmapPreview(); // update heightmap preview if opened
-    if (document.getElementById("_3dpreview")) draw3dPreview();     // update 3d heightmap preview if opened
+    if (document.getElementById("_3dpreview")) update3dpreview(_3dpreview); // update 3d heightmap preview if opened
   }
 
   // restart edits from 1st step
@@ -870,7 +870,8 @@ function getHeight(h) {
 
       updateStatistics();
       mockHeightmap();
-      update3dpreview(document.getElementById("_3dpreview"));
+      if (document.getElementById("preview")) drawHeightmapPreview(); // update heightmap preview if opened
+      if (document.getElementById("_3dpreview")) update3dpreview(_3dpreview); // update 3d heightmap preview if opened
     }
 
     function downloadTemplate() {
@@ -1135,7 +1136,6 @@ function getHeight(h) {
       heights.selectAll("polygon").remove();
       updateHeightmap();
     }
-    
   }
 
   function toggleHeightmapPreview() {
@@ -1183,27 +1183,6 @@ function getHeight(h) {
       canvas.height = svgHeight;
       document.body.insertBefore(canvas, optionsContainer);
       ctx.drawImage(img, 0, 0, svgWidth, svgHeight);
-
-      // const simplex = new SimplexNoise(); // SimplexNoise by Jonas Wagner
-      // const noise = (nx, ny) => simplex.noise2D(nx, ny) / 2 + .5;
-
-      // const imageData = ctx.getImageData(0, 0, svgWidth, svgHeight);
-      // for (let i=0; i < imageData.data.length; i+=4) {
-      //   const v = imageData.data[i];
-      //   if (v < 51) {
-      //     // water
-      //     // imageData.data[i] = imageData.data[i+1] = imageData.data[i+2] = 46;
-      //     continue;
-      //   }
-
-      //   const x = i / 4 % svgWidth, y = Math.floor(i / 4 / svgWidth);
-      //   const nx = x / svgWidth - .5, ny = y / svgHeight - .5;
-      //   const n = noise(4 * nx, 4 * ny) / 4 + noise(16 * nx, 16 * ny) / 16;
-      //   const nv = Math.max(Math.min((v + 255 * n) / 2, 255), 51);
-      //   imageData.data[i] = imageData.data[i+1] = imageData.data[i+2] = nv;
-      // }
-      // ctx.putImageData(imageData, 0, 0);
-
       const imgBig = canvas.toDataURL("image/png");
       const link = document.createElement("a");
       link.download = getFileName("Heightmap") + ".png";
@@ -1214,60 +1193,36 @@ function getHeight(h) {
     }
   }
 
-
-  function draw3dPreview() {
-    var _3dpreview = document.getElementById("_3dpreview");
-    hideCircle();
-    update3dpreview(_3dpreview); 
-    showCircle();
-  }
-
-  function close3dPreview() {
-    if (document.getElementById("_3dpreview")) {
-      stop3dpreview();
-
-      document.getElementById("_3dpreview").remove();
-    }
-  }
-
+  // 3D previewer
   function toggleHeightmap3dView() {
     if (document.getElementById("_3dpreview")) {
-      close3dPreview();
       $("#_3dpreviewEditor").dialog("close");
-
       return;
     }
 
-    var _3dpreview = document.createElement("canvas");
-    _3dpreview.id = "_3dpreview";
-    _3dpreview.top = 0;
-    _3dpreview.left = 0;
-    _3dpreview.width = 800;
-    _3dpreview.height = 800 / (graphWidth / graphHeight);
- 
+    const canvas = document.createElement("canvas");
+    canvas.id = "_3dpreview";
+    canvas.style.display = "block";
+    canvas.width = parseFloat(_3dpreviewEditor.style.width) || graphWidth / 3;
+    canvas.height = canvas.width / (graphWidth / graphHeight);
+    document.getElementById("_3dpreviewEditor").appendChild(canvas);
+    start3dpreview(canvas);
+
     $("#_3dpreviewEditor").dialog({
-      title: "3D Preview", width: _3dpreview.width, height: _3dpreview.height, resizable: true
-    }).on('dialogclose', close3dPreview);
-
-    var titleBar = document.getElementById("_3dpreviewEditor").previousSibling;
-    $("#_3dpreviewEditor").dialog( "option", "height", _3dpreview.height + titleBar.clientHeight + 3);
-
-    $("#_3dpreviewEditor").on("dialogresizestop", function(event, ui) { 
-      var titleBar = document.getElementById("_3dpreviewEditor").previousSibling;
-
-      var _3dpreview = document.getElementById("_3dpreview");
-      _3dpreview.width = ui.size.width;
-      _3dpreview.height = (ui.size.height - (titleBar.clientHeight + 3));
-      hideCircle();
-      update3dpreview(_3dpreview); 
-      showCircle();
+      title: "3D Preview", resizable: true,
+      position: {my: "left bottom", at: "left+10 bottom-10", of: "svg"},
+      resizeStop: resize3dpreview, close: close3dPreview
     });
 
-    hideCircle();
-    start3dpreview(_3dpreview);
-    showCircle();
+    function resize3dpreview() {
+      canvas.width = parseFloat(_3dpreviewEditor.style.width);
+      canvas.height = parseFloat(_3dpreviewEditor.style.height) - 2;
+      update3dpreview(canvas);
+    }
 
-    var _3dpreviewContainer = document.getElementById("_3dpreviewContainer");
-    _3dpreviewContainer.appendChild(_3dpreview);
+    function close3dPreview() {
+      stop3dpreview();
+      canvas.remove();
+    }
   }
 }
diff --git a/modules/ui/layers.js b/modules/ui/layers.js
index 255b3cc4..753d40f9 100644
--- a/modules/ui/layers.js
+++ b/modules/ui/layers.js
@@ -7,7 +7,7 @@ function restoreLayers() {
   if (layerIsOn("toggleCells")) drawCells();
   if (layerIsOn("toggleGrid")) drawGrid();
   if (layerIsOn("toggleCoordinates")) drawCoordinates();
-  if (layerIsOn("toggleCompass")) compass.attr("display", "block");
+  if (layerIsOn("toggleCompass")) compass.style("display", "block");
   if (layerIsOn("toggleTemp")) drawTemp();
   if (layerIsOn("togglePrec")) drawPrec();
   if (layerIsOn("togglePopulation")) drawPopulation();
@@ -19,7 +19,7 @@ function restoreLayers() {
 
   // states are getting rendered each time, if it's not required than layers should be hidden
   if (!layerIsOn("toggleBorders")) $('#borders').fadeOut();
-  if (!layerIsOn("toggleStates")) regions.attr("display", "none").selectAll("path").remove();
+  if (!layerIsOn("toggleStates")) regions.style("display", "none").selectAll("path").remove();
 }
 
 restoreLayers(); // run on-load
@@ -383,14 +383,14 @@ function togglePrec(event) {
     const hide = d3.transition().duration(1000).ease(d3.easeSinIn);
     prec.selectAll("text").attr("opacity", 1).transition(hide).attr("opacity", 0);
     prec.selectAll("circle").transition(hide).attr("r", 0).remove();
-    prec.transition().delay(1000).attr("display", "none");
+    prec.transition().delay(1000).style("display", "none");
   }
 }
 
 function drawPrec() {
   prec.selectAll("circle").remove();
   const cells = grid.cells, p = grid.points;
-  prec.attr("display", "block");
+  prec.style("display", "block");
   const show = d3.transition().duration(800).ease(d3.easeSinIn);
   prec.selectAll("text").attr("opacity", 0).transition(show).attr("opacity", 1);
 
@@ -583,12 +583,12 @@ function drawReligions() {
 function toggleStates(event) {
   if (!layerIsOn("toggleStates")) {
     turnButtonOn("toggleStates");
-    regions.attr("display", null);
+    regions.style("display", null);
     drawStates();
     if (event && event.ctrlKey) editStyle("regions");
   } else {
     if (event && event.ctrlKey) {editStyle("regions"); return;}
-    regions.attr("display", "none").selectAll("path").remove();
+    regions.style("display", "none").selectAll("path").remove();
     turnButtonOff("toggleStates");
   }
 }
diff --git a/modules/ui/options.js b/modules/ui/options.js
index 51228c1e..7e3922c0 100644
--- a/modules/ui/options.js
+++ b/modules/ui/options.js
@@ -346,8 +346,8 @@ document.getElementById("sticked").addEventListener("click", function(event) {
   else if (id === "zoomReset") resetZoom(1000);
   else if (id === "quickSave") quickSave();
   else if (id === "saveMap") saveMap();
-  else if (id === "saveSVG") saveAsImage("svg");
-  else if (id === "savePNG") saveAsImage("png");
+  else if (id === "saveSVG") saveSVG();
+  else if (id === "savePNG") savePNG();
   else if (id === "saveGeo") saveGeoJSON();
   else if (id === "saveDropbox") saveDropbox();
   if (id === "quickSave" || id === "saveMap" || id === "saveSVG" || id === "savePNG" || id === "saveGeo" || id === "saveDropbox") toggleSavePane();
diff --git a/modules/ui/provinces-editor.js b/modules/ui/provinces-editor.js
index 3838ce64..5353590d 100644
--- a/modules/ui/provinces-editor.js
+++ b/modules/ui/provinces-editor.js
@@ -336,7 +336,7 @@ function editProvinces() {
 
     if (inactive) {
       if (defs.select("#fog #focusProvince"+p).size()) return;
-      fogging.attr("display", "block");
+      fogging.style("display", "block");
       const path = provs.select("#province"+p).attr("d");
       defs.select("#fog").append("path").attr("d", path).attr("fill", "black").attr("id", "focusProvince"+p);
       fogging.append("path").attr("d", path).attr("id", "focusProvinceHalo"+p)
@@ -347,7 +347,7 @@ function editProvinces() {
   function unfocus(p) {
     defs.select("#focusProvince"+p).remove();
     fogging.select("#focusProvinceHalo"+p).remove();
-    if (!defs.selectAll("#fog path").size()) fogging.attr("display", "none"); // all items are de-focused
+    if (!defs.selectAll("#fog path").size()) fogging.style("display", "none"); // all items are de-focused
   }
 
   function removeProvince(p) {
diff --git a/modules/ui/states-editor.js b/modules/ui/states-editor.js
index 370450ef..2edd3041 100644
--- a/modules/ui/states-editor.js
+++ b/modules/ui/states-editor.js
@@ -393,7 +393,7 @@ function editStates() {
 
     if (inactive) {
       if (defs.select("#fog #focusState"+state).size()) return;
-      fogging.attr("display", "block");
+      fogging.style("display", "block");
       const path = statesBody.select("#state"+state).attr("d");
       defs.select("#fog").append("path").attr("d", path).attr("fill", "black").attr("id", "focusState"+state);
       fogging.append("path").attr("d", path).attr("id", "focusStateHalo"+state)
@@ -404,7 +404,7 @@ function editStates() {
   function unfocus(s) {
     defs.select("#focusState"+s).remove();
     fogging.select("#focusStateHalo"+s).remove();
-    if (!defs.selectAll("#fog path").size()) fogging.attr("display", "none"); // all items are de-focused
+    if (!defs.selectAll("#fog path").size()) fogging.style("display", "none"); // all items are de-focused
   }
 
   function stateRemove(state) {
diff --git a/modules/ui/zones-editor.js b/modules/ui/zones-editor.js
index 66539979..2a91acd2 100644
--- a/modules/ui/zones-editor.js
+++ b/modules/ui/zones-editor.js
@@ -264,13 +264,13 @@ function editZones() {
       const data = dataCells.split(",").map(c => +c);
       const g = defs.select("#fog").append("g").attr("fill", "black").attr("stroke", "black").attr("id", "focus"+zone);
       g.selectAll("path").data(data).enter().append("path").attr("d", d => "M" + getPackPolygon(d) + "Z");
-      fogging.attr("display", "block");
+      fogging.style("display", "block");
     } else unfocus(zone);
   }
 
   function unfocus(z) {
     defs.select("#focus"+z).remove();
-    if (!defs.selectAll("#fog path").size()) fogging.attr("display", "none"); // all states are de-focused
+    if (!defs.selectAll("#fog path").size()) fogging.style("display", "none"); // all states are de-focused
   }
 
   function toggleLegend() {