diff --git a/demos/cube-generated/SolidColorSource.js b/demos/cube-generated/SolidColorSource.js
index e46824b48..abbbc0208 100644
--- a/demos/cube-generated/SolidColorSource.js
+++ b/demos/cube-generated/SolidColorSource.js
@@ -16,18 +16,21 @@
 'use strict';
 
 // Custom tile source for procedurally generated solid color tiles.
-function SolidColorSource(width, height) {
+function SolidColorSource(width, height, tileSize) {
   this._width = width;
   this._height = height;
+  this._tileSize = tileSize;
 }
 
-SolidColorSource.prototype._tileText = function(tile) {
+SolidColorSource.prototype._tileText = function(tile, width, height) {
   var components = [];
   if (tile.face) {
     components.push("face:" + tile.face);
   }
   components.push("x:" + tile.x);
   components.push("y:" + tile.y);
+  components.push("width:" + width);
+  components.push("height:" + height);
   components.push("zoom:" + tile.z);
   return components.join(" ");
 };
@@ -45,11 +48,24 @@ SolidColorSource.prototype._tileColor = function(tile) {
 };
 
 SolidColorSource.prototype.loadAsset = function(stage, tile, done) {
-  var width = this._width;
-  var height = this._height;
-  var text = this._tileText(tile);
+  var _width = this._width * (tile.z + 1);
+  var _height = this._height * (tile.z + 1);
+  var width;
+  // Compute tile x remainder
+  if (this._tileSize * (tile.x + 1) > _width) {
+    width = (_width / this._tileSize - tile.x) * this._tileSize;
+  } else {
+    width = this._tileSize;
+  }
+  var height;
+  // Compute tile y remainder
+  if (this._tileSize * (tile.y + 1) > _height) {
+    height = (_height / this._tileSize - tile.y) * this._tileSize;
+  } else {
+    height = this._tileSize;
+  }
+  var text = this._tileText(tile, width, height);
   var color = this._tileColor(tile);
-
   // Create the canvas element.
   var element = document.createElement("canvas");
   element.width = width;
diff --git a/demos/cube-generated/index.js b/demos/cube-generated/index.js
index 59cba30c6..263cc8827 100644
--- a/demos/cube-generated/index.js
+++ b/demos/cube-generated/index.js
@@ -19,12 +19,12 @@
 var viewer = new Marzipano.Viewer(document.getElementById('pano'));
 
 // Create procedurally-generated single-color tile source.
-var source = new SolidColorSource(512, 512);
+var source = new SolidColorSource(1600, 1600, 512);
 
 // Create geometry with a very large number of levels.
 var levels = [];
 for(var i = 0; i < 32; i++) {
-  levels.push({ tileSize: 512, size: 512 * Math.pow(2,i) });
+  levels.push({ tileSize: 512, size: 800 * Math.pow(2,i) });
 }
 var geometry = new Marzipano.CubeGeometry(levels);
 
diff --git a/src/geometries/Cube.js b/src/geometries/Cube.js
index 4308b1131..d1f469b27 100644
--- a/src/geometries/Cube.js
+++ b/src/geometries/Cube.js
@@ -124,6 +124,8 @@ function CubeTile(face, x, y, z, geometry) {
   this.z = z;
   this._geometry = geometry;
   this._level = geometry.levelList[z];
+  // Pre compute last tile size, when all is square, it's 0
+  this._tileResidue = this._level.width() % this._level.tileWidth();
 }
 
 
@@ -138,32 +140,44 @@ CubeTile.prototype.rotY = function() {
 
 
 CubeTile.prototype.centerX = function() {
-  return (this.x + 0.5) / this._level.numHorizontalTiles() - 0.5;
+  var levelWidth = this._level.width();
+  var tileWidth = this._level.tileWidth();
+  return (this.x * tileWidth + 0.5 * this.width()) / levelWidth - 0.5;
 };
 
 
 CubeTile.prototype.centerY = function() {
-  return 0.5 - (this.y + 0.5) / this._level.numVerticalTiles();
+  var levelHeight = this._level.height();
+  var tileHeight = this._level.tileHeight();
+  return 0.5 - (this.y * tileHeight + 0.5 * this.height()) / levelHeight;
 };
 
 
 CubeTile.prototype.scaleX = function() {
-  return 1 / this._level.numHorizontalTiles();
+  return this.width() / this._level.width();
 };
 
 
 CubeTile.prototype.scaleY = function() {
-  return 1 / this._level.numVerticalTiles();
+  return this.height() / this._level.width();
 };
 
 
 CubeTile.prototype.width = function() {
+  // Return remainder when it's edge and the tile has residue
+  if (this.atRightEdge() && this._tileResidue !== 0) {
+    return this._tileResidue;
+  }
   return this._level.tileWidth();
 };
 
 
 CubeTile.prototype.height = function() {
-  return this._level.tileHeight();
+  // Return remainder when it's edge and the tile has residue
+  if (this.atBottomEdge() && this._tileResidue !== 0) {
+    return this._tileResidue;
+  }
+  return this._level.tileWidth();
 };
 
 
@@ -458,11 +472,6 @@ function CubeLevel(levelProperties) {
 
   this._size = levelProperties.size;
   this._tileSize = levelProperties.tileSize;
-
-  if (this._size % this._tileSize !== 0) {
-    throw new Error('Level size is not multiple of tile size: ' +
-                    this._size + ' ' + this._tileSize);
-  }
 }
 
 inherits(CubeLevel, Level);
@@ -538,11 +547,11 @@ CubeLevel.prototype._validateWithParentLevel = function(parentLevel) {
  * multiple resolution levels.
  *
  * The following restrictions apply:
- *   - All tiles in a level must be square and form a rectangular grid;
- *   - The size of a level must be a multiple of the tile size;
+ *   - All tiles must be square, except when in the last row or column position,
+ *     and must form a rectangular grid;
  *   - The size of a level must be a multiple of the parent level size;
- *   - The number of tiles in a level must be a multiple of the number of tiles
- *     in the parent level.
+ *   - The tile width (respectively, height) for a level must be a submultiple
+ *     of the tile width (respectively, height) for the parent level.
  *
  * @param {Object[]} levelPropertiesList Level description
  * @param {number} levelPropertiesList[].size Cube face size in pixels
diff --git a/test/suite/geometries/Cube.js b/test/suite/geometries/Cube.js
index 55d28575b..0e7e2056f 100644
--- a/test/suite/geometries/Cube.js
+++ b/test/suite/geometries/Cube.js
@@ -31,34 +31,6 @@ suite('CubeGeometry', function() {
     return false;
   }
 
-  suite('malformed levels', function() {
-
-    test('level size must not be smaller than parent level', function() {
-      assert.throws(function() {
-        new Cube([{ tileSize: 512, size: 512 }, { tileSize: 512, size: 500 }]);
-      });
-    });
-
-    test('level size must be multiple of parent level', function() {
-      assert.throws(function() {
-        new Cube([{ tileSize: 512, size: 512 }, { tileSize: 512, size: 1000 }]);
-      });
-    });
-
-    test('number of tiles in level must not be smaller than parent level', function() {
-      assert.throws(function() {
-        new Cube([{ tileSize: 128, size: 512 }, { tileSize: 512, size: 1024 }]);
-      });
-    });
-
-    test('number of tiles in level must be multiple of parent level', function() {
-      assert.throws(function() {
-        new Cube([{ tileSize: 256, size: 512 }, { tileSize: 512, size: 512*3 }]);
-      });
-    });
-
-  });
-
   suite('levels with constant tile size', function() {
 
     var cube = null;