MaterialID renders black

[anamichelena]

Hi everyone!

i am a relatively new 'Vray for Sketchup' user.
Since yesterday I encountered a problem that didn't occur before:
when I render my model, all render elements come out fine EXCEPT for the MaterialID which turns out completely black and the ObjectID which turns out completely white. Strange!
I tried rendering a model already I rendered before (with all passes turning out just fine back then) with the same result: completely black MaterialID and white ObjectID.

Anyone recognizes this problem or/and knows how to solve this?
My gratitude will be yours forever! ​

I am using Vray for Sketchup 3.40.04 and Sketchup Pro 2017 (version 17.2.2555) on a windows laptop.

Thanks!
Ana

[andybot]

If you are rendering with GPU, MaterialID is not supported. A quick and dirty workaround is to use the "Diffuse" render element. Otherwise, you have to switch to CPU rendering for support of Mat ID.

[anamichelena]

You are right, that was the problem...

thank a lot for your quick and useful reply!!