Here's the new version:

http://www.sierracosworth.nl/gamedev/2013-08-29_demo_vsync.zip

V-sync mouselook solved and some minor non-visible changes.

Always happy to get feedback.

I personally prefer V-sync on, because tearing is clearly visible when turned off (at least on my machine)

The music is far too epic for that scene :P.

Anyway, on GeForce GTX 660 TI the circular artifact is not visible. But the weaker computer does support pixel shader 3, so maybe your detection code is a little bit too aggressive in cutting down anisotropic filtering and what-not.

I know, but it's such a good song/ theme :)

Thanks for the feedback on the SM2 / SM3 variances, I'll do some research and tweak it.

Honestly I'm trying to think about a cool scene to make, just for testing the engine. Any suggestions? :)

I'd say the performance is pretty good!

I'm on an Athlon X3 450 and GeForce240 DDR3.

Windowed locks at 60fps, about 15%CPU@800Mhz.

Sync-off goes easily over 200fps.

If you want to test geometric subsystems, I think maps from Quake3 "geometrical competitions" are awesome. They got basically no pixel detail so no fancy shader tricks and can easily blow 20k triangles per view. But they're pretty un-handy if you don't have the filter ready to go.