Hello Jose,
I have a HUGE terrain which uses paged LOD.
...
Using ShadowTexture technique drops my frame-rate from 60+ to
low 30's to high teens.
...
Finally, using ShadowMap puts OSG on its knees at ~6 fps.
You neglected to tell us what kind of hardware you're using, and what
version of OSG.
I've only seen ShadowMap do so bad in two cases:
1. when the video card driver was falling back to software emulation for
FBOs (for the shadowmap render to texture)
2. when the shadow map texture resolution is higher than the video card
can support (most of the time, 4096x4096 or 8192x8192 is the limit on
recent video cards)
Perhaps one of those could be your problem?
If you have a large terrain, using ShadowMap with a very large texture
size is not a solution. Other shadow techniques are more adapted to
large scenes, such as PSSM or LiSPSM (the former is already in OSG, the
latter should be integrated soon).
Hope this helps,
J-S
--
______________________________________________________
Jean-Sebastien Guay [EMAIL PROTECTED]
http://www.cm-labs.com/
http://whitestar02.webhop.org/
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