VRay 2Sided material - Light go through?

V-Ray V-Ray for 3ds Max General
1

Sometime ago someone asked if light go through object with 2sided material and the answer was yes with GI on.

But as you can see on pictures, it doesnt look like this. When look at papers from bottom, its translucent, so ok. But on the other image, shadow from papers is the same everywhere. I think it should be more visible in the middle (where to papers are over each other) and less visible, where is only one paper. What you think or am I missing something?

Thanks.

planes 2sided other side.jpg
planes 2sided other side.jpg816×612 33.1 KB

planes 2sided.jpg
planes 2sided.jpg816×612 24.2 KB

2

Works fine here. I think the problem lies in the fact that you’re papers are too far from the surface that catches the shadow and your light is too weak. See my tests. Same setup as yours (more or less). But my papers are somewhat closer to the plane.

Test.jpg
Test.jpg640×480 75.8 KB

Test2.jpg
Test2.jpg640×480 65.3 KB

3

Yes, you have right. But still shadow is very blurry and light go through paper is really weak no matter intensity of light source and how 2sided material is set up. Translucency setting doesnt matter, light is still weak even with translucency 128, which sould be the highest.

And one more thing - I change light to sun which is really intensity. Put papers very close to ground so shadow is very very sharp. But double shadow from both papers is still very blurry. Its not possible I think.