1
$\begingroup$

I'm having a problem with multiple materials and multiple importance sample options on the light.

I make a vertex color to assign the different material to the vertex. Node setup is in the screenshot. Also, I choose the multiple importance sample option on the sun lamp.

The problem is the shadow from invisible part of the prism. I need to make a shadow only from a visible part. Also, there is no way to call a vertex group by name, only by color, right?

enter image description here

$\endgroup$
  • 1
    $\begingroup$ Make sure transparent shadows is enabled in Properties > Material > Settings, and that Shadows is enabled in Render settings > Light paths. Also note that you can directly assign separate materials to different faces, which might be want you want. See blender.stackexchange.com/q/9292/599 $\endgroup$ – gandalf3 Dec 18 '14 at 11:23
  • $\begingroup$ Thanks for your reply! The problem was in zero difuse reflection bounces in Light Paths settings. $\endgroup$ – Ilya Kanatov Dec 19 '14 at 5:29
  • $\begingroup$ Yep, that would do it too. Glad you found the answer :) Feel free to post it in an answer below so this can be marked as answered, making it easier for others with the same issue to find. Thanks :) $\endgroup$ – gandalf3 Dec 19 '14 at 7:51
1
$\begingroup$

The problem was that there were zero diffuse reflection bounces. This value can be set in the Light Paths settings.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.