diff --git a/index.html b/index.html
index 7405ff94..c0a4abc9 100644
--- a/index.html
+++ b/index.html
@@ -1310,9 +1310,9 @@
                 <td>Line style</td>
                 <td>
                   <select id="styleHeightmapCurve">
-                    <option value="0" selected>Curved</option>
-                    <option value="1">Linear</option>
-                    <option value="2">Rectangular</option>
+                    <option value="curveBasisClosed" selected>Curved</option>
+                    <option value="curveLinear">Linear</option>
+                    <option value="curveStep">Rectangular</option>
                   </select>
                 </td>
               </tr>
diff --git a/main.js b/main.js
index 6db57f59..c065fe51 100644
--- a/main.js
+++ b/main.js
@@ -92,16 +92,19 @@ let fogging = viewbox
 let ruler = viewbox.append("g").attr("id", "ruler").style("display", "none");
 let debug = viewbox.append("g").attr("id", "debug");
 
-// lake and coast groups
 lakes.append("g").attr("id", "freshwater");
 lakes.append("g").attr("id", "salt");
 lakes.append("g").attr("id", "sinkhole");
 lakes.append("g").attr("id", "frozen");
 lakes.append("g").attr("id", "lava");
 lakes.append("g").attr("id", "dry");
+
 coastline.append("g").attr("id", "sea_island");
 coastline.append("g").attr("id", "lake_island");
 
+terrs.append("g").attr("id", "oceanHeights");
+terrs.append("g").attr("id", "landHeights");
+
 labels.append("g").attr("id", "states");
 labels.append("g").attr("id", "addedLabels");
 
@@ -135,7 +138,6 @@ fogging
   .attr("filter", "url(#splotch)");
 
 // assign events separately as not a viewbox child
-scaleBar.on("mousemove", () => tip("Click to open Units Editor")).on("click", () => editUnits());
 legend
   .on("mousemove", () => tip("Drag to change the position. Click to hide the legend"))
   .on("click", () => clearLegend());
diff --git a/modules/dynamic/auto-update.js b/modules/dynamic/auto-update.js
index 5dbebb60..124e32ff 100644
--- a/modules/dynamic/auto-update.js
+++ b/modules/dynamic/auto-update.js
@@ -736,4 +736,46 @@ export function resolveVersionConflicts(version) {
       .style("display", "none");
     vignette.append("rect").attr("x", 0).attr("y", 0).attr("width", "100%").attr("height", "100%");
   }
+
+  if (version < 1.96) {
+    // v1.96 added ocean rendering for heightmap
+    terrs.selectAll("*").remove();
+
+    const opacity = terrs.attr("opacity");
+    const filter = terrs.attr("filter");
+    const scheme = terrs.attr("scheme");
+    const terracing = terrs.attr("terracing");
+    const skip = terrs.attr("skip");
+    const relax = terrs.attr("relax");
+
+    const curveTypes = {0: "curveBasisClosed", 1: "curveLinear", 2: "curveStep"};
+    const curve = curveTypes[terrs.attr("curve")] || "curveBasisClosed";
+
+    terrs.attr("scheme", null).attr("terracing", null).attr("skip", null).attr("relax", null).attr("curve", null);
+
+    terrs
+      .append("g")
+      .attr("id", "oceanHeights")
+      .attr("data-render", 0)
+      .attr("opacity", opacity)
+      .attr("filter", filter)
+      .attr("scheme", scheme)
+      .attr("terracing", 0)
+      .attr("skip", 0)
+      .attr("relax", 1)
+      .attr("curve", curve);
+    terrs
+      .append("g")
+      .attr("id", "landHeights")
+      .attr("opacity", opacity)
+      .attr("scheme", scheme)
+      .attr("filter", filter)
+      .attr("terracing", terracing)
+      .attr("skip", skip)
+      .attr("relax", relax)
+      .attr("curve", curve)
+      .attr("mask", "url(#land)");
+
+    if (layerIsOn("toggleHeight")) drawHeightmap();
+  }
 }
diff --git a/modules/io/load.js b/modules/io/load.js
index 769c7d6a..60741753 100644
--- a/modules/io/load.js
+++ b/modules/io/load.js
@@ -468,10 +468,10 @@ async function parseLoadedData(data) {
 
     {
       // add custom heightmap color scheme if any
-      const scheme = terrs.attr("scheme");
-      if (!(scheme in heightmapColorSchemes)) {
-        addCustomColorScheme(scheme);
-      }
+      const oceanScheme = terrs.select("#oceanHeights").attr("scheme");
+      const landScheme = terrs.select("#landHeights").attr("scheme");
+      if (!(oceanScheme in heightmapColorSchemes)) addCustomColorScheme(oceanScheme);
+      if (!(landScheme in heightmapColorSchemes)) addCustomColorScheme(landScheme);
     }
 
     {
diff --git a/modules/ui/layers.js b/modules/ui/layers.js
index 945f3df9..e20fe0cf 100644
--- a/modules/ui/layers.js
+++ b/modules/ui/layers.js
@@ -188,92 +188,134 @@ function restoreLayers() {
 }
 
 function toggleHeight(event) {
-  if (customization === 1) {
-    tip("You cannot turn off the layer when heightmap is in edit mode", false, "error");
-    return;
-  }
+  if (customization === 1) return tip("You cannot turn off the layer when heightmap is in edit mode", false, "error");
 
-  if (!terrs.selectAll("*").size()) {
+  const children = terrs.selectAll("#oceanHeights > *, #landHeights > *");
+  if (!children.size()) {
     turnButtonOn("toggleHeight");
     drawHeightmap();
     if (event && isCtrlClick(event)) editStyle("terrs");
   } else {
-    if (event && isCtrlClick(event)) {
-      editStyle("terrs");
-      return;
-    }
+    if (event && isCtrlClick(event)) return editStyle("terrs");
     turnButtonOff("toggleHeight");
-    terrs.selectAll("*").remove();
+    children.remove();
   }
 }
 
 function drawHeightmap() {
   TIME && console.time("drawHeightmap");
-  terrs.selectAll("*").remove();
 
-  const {cells, vertices} = pack;
-  const n = cells.i.length;
-  const used = new Uint8Array(cells.i.length);
-  const paths = new Array(101).fill("");
+  const ocean = terrs.select("#oceanHeights");
+  const land = terrs.select("#landHeights");
 
-  const scheme = getColorScheme(terrs.attr("scheme"));
-  const terracing = terrs.attr("terracing") / 10; // add additional shifted darker layer for pseudo-3d effect
-  const skip = +terrs.attr("skip") + 1;
-  const simplification = +terrs.attr("relax");
+  ocean.selectAll("*").remove();
+  land.selectAll("*").remove();
 
-  switch (+terrs.attr("curve")) {
-    case 0:
-      lineGen.curve(d3.curveBasisClosed);
-      break;
-    case 1:
-      lineGen.curve(d3.curveLinear);
-      break;
-    case 2:
-      lineGen.curve(d3.curveStep);
-      break;
-    default:
-      lineGen.curve(d3.curveBasisClosed);
+  const paths = new Array(101);
+
+  // ocean cells
+  const renderOceanCells = Boolean(+ocean.attr("data-render"));
+  if (renderOceanCells) {
+    const {cells, vertices} = grid;
+    const used = new Uint8Array(cells.i.length);
+
+    const skip = +ocean.attr("skip") + 1 || 1;
+    const relax = +ocean.attr("relax") || 0;
+
+    let currentLayer = 0;
+    const heights = cells.i.sort((a, b) => cells.h[a] - cells.h[b]);
+    for (const i of heights) {
+      const h = cells.h[i];
+      if (h > currentLayer) currentLayer += skip;
+      if (h < currentLayer) continue;
+      if (currentLayer >= 20) break;
+      if (used[i]) continue; // already marked
+      const onborder = cells.c[i].some(n => cells.h[n] < h);
+      if (!onborder) continue;
+      const vertex = cells.v[i].find(v => vertices.c[v].some(i => cells.h[i] < h));
+      const chain = connectVertices(cells, vertices, vertex, h, used);
+      if (chain.length < 3) continue;
+      const points = simplifyLine(chain, relax).map(v => vertices.p[v]);
+      if (!paths[h]) paths[h] = "";
+      paths[h] += round(lineGen(points));
+    }
   }
 
-  let currentLayer = 20;
-  const heights = cells.i.sort((a, b) => cells.h[a] - cells.h[b]);
-  for (const i of heights) {
-    const h = cells.h[i];
-    if (h > currentLayer) currentLayer += skip;
-    if (currentLayer > 100) break; // no layers possible with height > 100
-    if (h < currentLayer) continue;
-    if (used[i]) continue; // already marked
-    const onborder = cells.c[i].some(n => cells.h[n] < h);
-    if (!onborder) continue;
-    const vertex = cells.v[i].find(v => vertices.c[v].some(i => cells.h[i] < h));
-    const chain = connectVertices(vertex, h);
-    if (chain.length < 3) continue;
-    const points = simplifyLine(chain).map(v => vertices.p[v]);
-    paths[h] += round(lineGen(points));
+  // land cells
+  {
+    const {cells, vertices} = pack;
+    const used = new Uint8Array(cells.i.length);
+
+    const skip = +land.attr("skip") + 1 || 1;
+    const relax = +land.attr("relax") || 0;
+
+    let currentLayer = 20;
+    const heights = cells.i.sort((a, b) => cells.h[a] - cells.h[b]);
+    for (const i of heights) {
+      const h = cells.h[i];
+      if (h > currentLayer) currentLayer += skip;
+      if (h < currentLayer) continue;
+      if (currentLayer > 100) break; // no layers possible with height > 100
+      if (used[i]) continue; // already marked
+      const onborder = cells.c[i].some(n => cells.h[n] < h);
+      if (!onborder) continue;
+      const vertex = cells.v[i].find(v => vertices.c[v].some(i => cells.h[i] < h));
+      const chain = connectVertices(cells, vertices, vertex, h, used);
+      if (chain.length < 3) continue;
+      const points = simplifyLine(chain, relax).map(v => vertices.p[v]);
+      if (!paths[h]) paths[h] = "";
+      paths[h] += round(lineGen(points));
+    }
   }
 
-  terrs
-    .append("rect")
-    .attr("x", 0)
-    .attr("y", 0)
-    .attr("width", graphWidth)
-    .attr("height", graphHeight)
-    .attr("fill", scheme(0.8)); // draw base layer
-  for (const i of d3.range(20, 101)) {
-    if (paths[i].length < 10) continue;
-    const color = getColor(i, scheme);
-    if (terracing)
-      terrs
-        .append("path")
-        .attr("d", paths[i])
-        .attr("transform", "translate(.7,1.4)")
-        .attr("fill", d3.color(color).darker(terracing))
-        .attr("data-height", i);
-    terrs.append("path").attr("d", paths[i]).attr("fill", color).attr("data-height", i);
+  // render paths
+  for (const h of d3.range(0, 101)) {
+    const group = h < 20 ? ocean : land;
+    const scheme = getColorScheme(group.attr("scheme"));
+
+    if (h === 0 && renderOceanCells) {
+      // draw base ocean layer
+      group
+        .append("rect")
+        .attr("x", 0)
+        .attr("y", 0)
+        .attr("width", graphWidth)
+        .attr("height", graphHeight)
+        .attr("fill", scheme(1));
+    }
+
+    if (h === 20) {
+      // draw base land layer
+      group
+        .append("rect")
+        .attr("x", 0)
+        .attr("y", 0)
+        .attr("width", graphWidth)
+        .attr("height", graphHeight)
+        .attr("fill", scheme(0.8));
+    }
+
+    if (paths[h] && paths[h].length >= 10) {
+      const curve = group.attr("curve") || "curveBasisClosed";
+      lineGen.curve(d3[curve]);
+      const terracing = group.attr("terracing") / 10 || 0; // shifted darker layer for pseudo-3d effect
+      const color = getColor(h, scheme);
+
+      if (terracing && h >= 20) {
+        land
+          .append("path")
+          .attr("d", paths[h])
+          .attr("transform", "translate(.7,1.4)")
+          .attr("fill", d3.color(color).darker(terracing))
+          .attr("data-height", h);
+      }
+      group.append("path").attr("d", paths[h]).attr("fill", color).attr("data-height", h);
+    }
   }
 
   // connect vertices to chain
-  function connectVertices(start, h) {
+  function connectVertices(cells, vertices, start, h, used) {
+    const n = cells.i.length;
     const chain = []; // vertices chain to form a path
     for (let i = 0, current = start; i === 0 || (current !== start && i < 20000); i++) {
       const prev = chain[chain.length - 1]; // previous vertex in chain
@@ -295,7 +337,7 @@ function drawHeightmap() {
     return chain;
   }
 
-  function simplifyLine(chain) {
+  function simplifyLine(chain, simplification) {
     if (!simplification) return chain;
     const n = simplification + 1; // filter each nth element
     return chain.filter((d, i) => i % n === 0);
diff --git a/styles/ancient.json b/styles/ancient.json
index e57f2d87..7d675a3f 100644
--- a/styles/ancient.json
+++ b/styles/ancient.json
@@ -292,7 +292,9 @@
     "terracing": 0,
     "skip": 2,
     "relax": 1,
-    "curve": 0,
+    "curve": "curveBasisClosed",
+    "skipOcean": 0,
+    "relaxOcean": 1,
     "filter": "url(#blur3)",
     "mask": "url(#land)"
   },
diff --git a/styles/atlas.json b/styles/atlas.json
index 6366e5f4..79ba9a87 100644
--- a/styles/atlas.json
+++ b/styles/atlas.json
@@ -292,7 +292,9 @@
     "terracing": 0,
     "skip": 0,
     "relax": 0,
-    "curve": 0,
+    "curve": "curveBasisClosed",
+    "skipOcean": 0,
+    "relaxOcean": 1,
     "filter": null,
     "mask": "url(#land)"
   },
diff --git a/styles/clean.json b/styles/clean.json
index ba3685a4..53419fba 100644
--- a/styles/clean.json
+++ b/styles/clean.json
@@ -294,7 +294,9 @@
     "terracing": 0,
     "skip": 5,
     "relax": 0,
-    "curve": 0,
+    "curve": "curveBasisClosed",
+    "skipOcean": 0,
+    "relaxOcean": 1,
     "filter": null,
     "mask": "url(#land)"
   },
diff --git a/styles/cyberpunk.json b/styles/cyberpunk.json
index e69f5c43..c8b99264 100644
--- a/styles/cyberpunk.json
+++ b/styles/cyberpunk.json
@@ -292,7 +292,9 @@
     "terracing": 6,
     "skip": 0,
     "relax": 2,
-    "curve": 0,
+    "curve": "curveBasisClosed",
+    "skipOcean": 0,
+    "relaxOcean": 1,
     "filter": "",
     "mask": "url(#land)"
   },
diff --git a/styles/default.json b/styles/default.json
index e2cf0e6d..45b28bc5 100644
--- a/styles/default.json
+++ b/styles/default.json
@@ -286,13 +286,24 @@
     "href": "./images/pattern1.png",
     "opacity": 0.2
   },
-  "#terrs": {
-    "opacity": null,
+  "#terrs > #oceanHeights": {
+    "data-render": 0,
+    "opacity": 1,
+    "scheme": "bright",
+    "terracing": 0,
+    "skip": 0,
+    "relax": 1,
+    "curve": "curveBasisClosed",
+    "filter": null,
+    "mask": null
+  },
+  "#terrs > #landHeights": {
+    "opacity": 1,
     "scheme": "bright",
     "terracing": 0,
     "skip": 5,
     "relax": 0,
-    "curve": 0,
+    "curve": "curveBasisClosed",
     "filter": null,
     "mask": "url(#land)"
   },
diff --git a/styles/gloom.json b/styles/gloom.json
index ec4084d2..80e4f196 100644
--- a/styles/gloom.json
+++ b/styles/gloom.json
@@ -294,7 +294,9 @@
     "terracing": 2,
     "skip": 1,
     "relax": 2,
-    "curve": 0,
+    "curve": "curveBasisClosed",
+    "skipOcean": 0,
+    "relaxOcean": 1,
     "filter": "url(#filter-grayscale)",
     "mask": "url(#land)"
   },
diff --git a/styles/light.json b/styles/light.json
index 978a039b..43f7acd4 100644
--- a/styles/light.json
+++ b/styles/light.json
@@ -292,7 +292,9 @@
     "terracing": 10,
     "skip": 5,
     "relax": 0,
-    "curve": 0,
+    "curve": "curveBasisClosed",
+    "skipOcean": 0,
+    "relaxOcean": 1,
     "filter": "url(#turbulence)",
     "mask": "url(#land)"
   },
diff --git a/styles/monochrome.json b/styles/monochrome.json
index 23ff7a48..7f93bb43 100644
--- a/styles/monochrome.json
+++ b/styles/monochrome.json
@@ -287,7 +287,9 @@
     "terracing": 0,
     "skip": 5,
     "relax": 0,
-    "curve": 0,
+    "curve": "curveBasisClosed",
+    "skipOcean": 0,
+    "relaxOcean": 1,
     "filter": "url(#blur3)",
     "mask": "url(#land)"
   },
diff --git a/styles/night.json b/styles/night.json
index 99df7867..83b278e2 100644
--- a/styles/night.json
+++ b/styles/night.json
@@ -292,7 +292,9 @@
     "terracing": 0,
     "skip": 10,
     "relax": 0,
-    "curve": 0,
+    "curve": "curveBasisClosed",
+    "skipOcean": 0,
+    "relaxOcean": 1,
     "filter": "url(#blurFilter)",
     "mask": "url(#land)"
   },
diff --git a/styles/pale.json b/styles/pale.json
index 4bddc4d2..4267f47d 100644
--- a/styles/pale.json
+++ b/styles/pale.json
@@ -292,7 +292,9 @@
     "terracing": 0,
     "skip": 2,
     "relax": 1,
-    "curve": 0,
+    "curve": "curveBasisClosed",
+    "skipOcean": 0,
+    "relaxOcean": 1,
     "filter": "",
     "mask": "url(#land)"
   },
diff --git a/styles/watercolor.json b/styles/watercolor.json
index 01763c1b..fc0201bc 100644
--- a/styles/watercolor.json
+++ b/styles/watercolor.json
@@ -292,7 +292,9 @@
     "terracing": 0,
     "skip": 5,
     "relax": 1,
-    "curve": 0,
+    "curve": "curveBasisClosed",
+    "skipOcean": 0,
+    "relaxOcean": 1,
     "filter": null,
     "mask": "url(#land)"
   },
diff --git a/versioning.js b/versioning.js
index 4e4fb075..5bf367ac 100644
--- a/versioning.js
+++ b/versioning.js
@@ -1,7 +1,7 @@
 "use strict";
 
 // version and caching control
-const version = "1.95.04"; // generator version, update each time
+const version = "1.96.00"; // generator version, update each time
 
 {
   document.title += " v" + version;
@@ -28,6 +28,7 @@ const version = "1.95.04"; // generator version, update each time
 
       <ul>
         <strong>Latest changes:</strong>
+        <li>Ability to render ocean heightmap</li>
         <li>Vignette visual layer and vignette styling options</li>
         <li>Ability to define custom heightmap color scheme</li>
         <li>New style preset Night and new heightmap color schemes</li>