shadow maps vs shadow volumes

OpenGL OpenGL: Advanced Coding
1

The question is :

What’s faster? Shadow maps or shadow volumes. It’s not fast neither read light z-buffer nor build geometry for each edge of casting objects, so, what choose?

Thanks,

2

For the time being, shadow volumes are probably the best choice. They tend to be faster, more universally supported, and better quality. Shadow maps really are a more elegant technique and they scale to high geometry scenes better, but right now (for good quality) they typically require REALLY large textures.

3

Thanks,

4

Does anyone have some good bookmarks/links/info about shadow volumes? Thanks!

5

Punchey, here are some good URL for shadow volumes casting :
http://www.gamasutra.com/features/19991115/bestimt_freitag_01.htm
http://nehe.gamedev.net/tutorials/lesson28.asp