Hey Guys. I got an idea after I tried this and wanted to suggest it. If there is some interest in this you might consider making your curtain folds and fabric texture available so people can use them to make their own textures. Won't work for every texture and need a lighter color fabric but I made a quick example shadow map here and also put together a quick psd file so you can get a quick at one way to put a curtain together with layers.

Here is the shadow map I made



Here is the zip file (2.9 MB) with all the layers as an example

http://stormvisions.com/3DGS/curtain_layers.zip

and here is the quickie texture I produced my mixing the color layer, shadowmap, and a few other layers.



Hope this is useful for those who might be interested in learning.

Burt