Originally posted by wahbeans
They must be .jpg format and onl 256 x 256 and the other sizes listed on the site!
Get educated and read the helpfile. If you do, you'll find this:
"Textures can be in the format BMP, GIF, JPG or TGA. Textures must be a bit-wise size. This means that the pixel width and height must be a value of 32, 64, 128, 256, 512, 1024 or 2048. The texture size does not have to be square, in other words a texture can have a size of 512 x 128. As long as the width and height are of a bit-wise value."
Oh... On what site does it mention the sizes, got a link?