Render issue
 

I have rendered this in Mental ray with depth map shadows (may be the problem I have no clue) and it looks in some areas like it is granulated or something

Look by the shadows and it looks all grainy. I cant figure out what the deal is. Anyone have any suggestions or ideas?

Here is another picture

Try upping the Final Gather rays to 500-1000 maybe. If that doesn't work , increase it to 2000. But it might be that the actual model is too small, or too large. Since MR uses actual Model size and size characteristics for FG and Photon emission calculations, if your model is longer then 20 units or smaller then 3 or 4, then you should scale it to be between those two values.

Great, that is really helpful, I will try that out, thanks a ton!

Hey, dude, if you found out, how you did that tell me...

I think it looks really cool, looks like Comic or what ;-)