In your buffer version, you have this: if (j == 0) jj_n = i; Presumably that should be: if (j == 0) jj_n = j; ...

unity3d,rotation,quaternions,clamp

The problem seems to be in your if state logic. Lets break it up in some logical blocks: If the value is bigger then 65 > check the next block If this is not the case that means the value is under or equal to 65 and the if wont...

graphics,shader,probability,raytracing,clamp

I was having the same question you did. If you read http://blog.selfshadow.com/publications/s2012-shading-course/hoffman/s2012_pbs_physics_math_notes.pdf and http://blog.selfshadow.com/publications/s2012-shading-course/hoffman/s2012_pbs_physics_math_notebook.pdf You'll notice it's perfectly normal. To quote from the links: "The Beckmann Αb parameter is equal to the RMS (root mean square) microfacet slope. Therefore its valid range is from 0 (non-inclusive –0 corresponds to a...