diff --git a/index.html b/index.html
index a971702d..8ff720a0 100644
--- a/index.html
+++ b/index.html
@@ -1433,7 +1433,7 @@
             <i>Equator:</i>
             <input id="temperatureEquatorInput" data-stored="temperatureEquator" type="number" min="-50" max="50">°C =
             <span id="temperatureEquatorF"></span>°F
-            <input id="temperatureEquatorOutput" data-stored="temperatureEquator" type="range" min="-30" max="30"/>
+            <input id="temperatureEquatorOutput" data-stored="temperatureEquator" type="range" min="-50" max="50"/>
           </label>
         </div>
         <div>
@@ -1442,7 +1442,7 @@
             <i>Poles:</i>
             <input id="temperaturePoleInput" data-stored="temperaturePole" type="number" min="-50" max="50">°C =
             <span id="temperaturePoleF"></span>°F
-            <input id="temperaturePoleOutput" data-stored="temperaturePole" type="range" min="-30" max="30"/>
+            <input id="temperaturePoleOutput" data-stored="temperaturePole" type="range" min="-50" max="50"/>
           </label>
         </div>
         <div>
diff --git a/main.js b/main.js
index 0872ee04..1f6da981 100644
--- a/main.js
+++ b/main.js
@@ -754,8 +754,8 @@ function defineMapSize() {
   function getSizeAndLatitude() {
     const template = document.getElementById("templateInput").value; // heightmap template
     const part = grid.features.some(f => f.land && f.border); // if land goes over map borders
-    const max = part ? 85 : 100; // max size
-    const lat = part ? gauss(P(.5) ? 30 : 70, 15, 20, 80) : gauss(50, 20, 15, 85); // latiture shift
+    const max = part ? 80 : 100; // max size
+    const lat = () => gauss(P(.5) ? 40 : 60, 15, 25, 75); // latiture shift
 
     if (!part) {
       if (template === "Pangea") return [100, 50];
@@ -766,14 +766,14 @@ function defineMapSize() {
       if (template === "Low Island" && P(.1)) return [100, 50];
     }
 
-    if (template === "Pangea") return [gauss(75, 20, 30, max), lat];
-    if (template === "Volcano") return [gauss(30, 20, 10, max), lat];
-    if (template === "Mediterranean") return [gauss(30, 30, 15, 80), lat];
-    if (template === "Peninsula") return [gauss(15, 15, 5, 80), lat];
-    if (template === "Isthmus") return [gauss(20, 20, 3, 80), lat];
-    if (template === "Atoll") return [gauss(10, 10, 2, max), lat];
+    if (template === "Pangea") return [gauss(70, 20, 30, max), lat()];
+    if (template === "Volcano") return [gauss(20, 20, 10, max), lat()];
+    if (template === "Mediterranean") return [gauss(25, 30, 15, 80), lat()];
+    if (template === "Peninsula") return [gauss(15, 15, 5, 80), lat()];
+    if (template === "Isthmus") return [gauss(15, 20, 3, 80), lat()];
+    if (template === "Atoll") return [gauss(5, 10, 2, max), lat()];
 
-    return [gauss(40, 20, 15, max), lat]; // Continents, Archipelago, High Island, Low Island
+    return [gauss(30, 20, 15, max), lat()]; // Continents, Archipelago, High Island, Low Island
   }
 }
 
diff --git a/modules/ui/layers.js b/modules/ui/layers.js
index 295ba04e..a17e09df 100644
--- a/modules/ui/layers.js
+++ b/modules/ui/layers.js
@@ -484,8 +484,8 @@ function drawIce() {
   const used = new Uint8Array(cells.i.length);
   Math.random = aleaPRNG(seed);
 
-  const shieldMin = -6; // max temp to form ice shield (glacier)
-  const icebergMax = 2; // max temp to form an iceberg
+  const shieldMin = -8; // max temp to form ice shield (glacier)
+  const icebergMax = 1; // max temp to form an iceberg
 
   for (const i of grid.cells.i) {
     const t = temp[i];
diff --git a/modules/ui/options.js b/modules/ui/options.js
index 90767921..8d6df677 100644
--- a/modules/ui/options.js
+++ b/modules/ui/options.js
@@ -459,9 +459,9 @@ function randomizeOptions() {
 
   // 'Configure World' settings
   if (randomize || !locked("prec")) precInput.value = precOutput.value = gauss(100, 40, 5, 500);
-  const tMax = +temperatureEquatorOutput.max, tMin = +temperatureEquatorOutput.min; // temperature extremes
-  if (randomize || !locked("temperatureEquator")) temperatureEquatorOutput.value = temperatureEquatorInput.value = rand(tMax-6, tMax);
-  if (randomize || !locked("temperaturePole")) temperaturePoleOutput.value = temperaturePoleInput.value = rand(tMin, tMin+10);
+  const tMax = 30, tMin = -30; // temperature extremes
+  if (randomize || !locked("temperatureEquator")) temperatureEquatorOutput.value = temperatureEquatorInput.value = rand(tMax - 10, tMax);
+  if (randomize || !locked("temperaturePole")) temperaturePoleOutput.value = temperaturePoleInput.value = rand(tMin, tMin + 30);
 
   // 'Units Editor' settings
   const US = navigator.language === "en-US";
diff --git a/modules/ui/world-configurator.js b/modules/ui/world-configurator.js
index 8e7f255d..8cbd6a20 100644
--- a/modules/ui/world-configurator.js
+++ b/modules/ui/world-configurator.js
@@ -19,7 +19,7 @@ function editWorld() {
 
   const globe = d3.select("#globe");
   const clr = d3.scaleSequential(d3.interpolateSpectral);
-  const tMax = +temperatureEquatorOutput.max, tMin = +temperatureEquatorOutput.min; // temperature extremes
+  const tMax = 30, tMin = -25; // temperature extremes
   const projection = d3.geoOrthographic().translate([100, 100]).scale(100);
   const path = d3.geoPath(projection);