SSS affect shadow error

[Morbid Angel]

Here is a scene where I have an sss plane and a teapot behind this plane. The vray light is casting a shadow and gi is on. When affect shadow is off in sss vray mat it looks like image 1, when affect shadow is on the teapot seems to cast a different intensity shadow thru the sss plane, however it seems since there is only one light source that the shadow should be the same as the one cast buy the sss plane since it pases thru it.

No affect shadow


Affect shadow


Second bug is again with affect shadow, where object is thin it casts a very different shadow then what it appears to be. Here is 2 comparisons again:

affect shadow off



affect shadow on



as you can see the cup seems to be not transparent so much to cast such a transparent shadow. All tho it and a sphere have same shader the effect is totally different.

[flipside]

In the first scene, you have a plane without thickness? I think the problem comes from that.

In the second one, the affect shadow seems to behave normal. The sphere is 50 times thicker than the cup.

Affect shadow is fake caustics, I don't think it takes the translucency into account. Try to turn translucency off, it will probably give you the same shadow behavior.

[Morbid Angel]

flipside - in first example surfaces has thickness
in second i cant see how tansluscent surfaces can cast such shadow.

[flipside]

No indeed the shadows look wrong, but I think it's because of the affect shadows option which is only a fake and therefore produces wrong results with translucency.

[Morbid Angel]

well i thought i'd mention it, if vlado says its not a bug, i can rest in peace :P