r_ShadowTexFormat

0=use R16G16 texture format for depth map, 1=try to use R16 format if supported as render target
2=use R32F texture format for depth map
3=use ATI's DF24 texture format for depth map
4=use NVIDIA's D24S8 texture format for depth map
5=use NVIDIA's D16 texture format for depth map
Usage: r_ShadowTexFormat [0-5]