Fix edge case with multires tiles.

Previously, one could generate a tile set that had the second level resolution
equal to the tile resolution, so it only had one tile per face.

utils/multires/generate.py

@@ -132,6 +132,8 @@ else:
     cubeSize = 8 * int((360 / haov) * origWidth / math.pi / 8)
 tileSize = min(args.tileSize, cubeSize)
 levels = int(math.ceil(math.log(float(cubeSize) / tileSize, 2))) + 1
+if round(cubeSize / 2**(levels - 2)) == tileSize:
+    levels -= 1  # Handle edge case
 origHeight = str(origHeight)
 origWidth = str(origWidth)
 origFilename = os.path.join(os.getcwd(), args.inputFile)