Not long ago I thought it would be cool to have materials that partially look
metal and partially not.
I thought that the best way to do this is to use inhomogenous specular
highlighting. This can simply be done by using two textures, one with the metal
parts white and one with dark metal parts. And then I use the specular light to
blend between the two textures. This is really fast on a board that supports
multitexturing, and for the little effort it requires, I think it looks quite
good. I haven´t seen this anywhere so far, so I just thought about posting it
here. Maybe you can even use this technique for any game. A car with such a
texture might look good, I think...
You may download this program at http://www.crowsoft.de in the download section
(Be sure to get DirectX 8 first...) It´s rather slow as it draws the stones
two-pass as my graphics card doesn´t support multi-texturing, and so I can´t
test one-pass. It also doesn´t support T&L and for sure contains many bugs.
Enjoy it ;-)