[X3D-Public] TextureProperties issues

[Michalis Kamburelis]

One more note about texture compression:

It would be useful to specify how to treat the already-compressed
data, like a DDS that is already compressed with DXT1/DXT3/DXT5. IMHO,
the spec should in this case recommend that the implementation will
just use this format, if possible (if not possible, either decompress
(if possible) or jump to next ImageTexture.url for a fallback). This
way DDS textures nicely compressed with GIMP/Photoshop plugin (their
compression algorithm is slower but possibly much nicer than GPU) will
retain their benefit.

At least that's what view3dscene does now :) We also use pregenerated
mipmaps and other stuff, if DDS contains them.

Michalis