(In reply to comment #22) > And he said chips handle these cases, no driver need to somhow check for > those. I gueesed that maybe that "Stencil op fail or zfail is not KEEP" is > culprit but who knows :) > > http://amd-dev.wpengine.netdna-cdn.com/wordpress/media/2012/10/Depth_in- > depth.pdf#6 > http://amd-dev.wpengine.netdna-cdn.com/wordpress/media/2012/10/Depth_in- > depth.pdf#10 I mean that one for an artifacts we have in some apps :) "Unfortunately the conventional method can get artifacts if the shadow volume intersects the near clipping plane (if front plane capping is not used, that is), which has made the Z-fail method the algorithm of choice for most deve lopers."