I made an ID mask for the car but on the tail light where the white colour is presented the mask has these errors (black parts) - why?
This is the render with transparent BKG:
The car (all parts) has the pass index of 1 but here U could see the tail lights on the mask:
…any advices? The material was slightly darker before this happens and to be exact when I change it to something different (tried the orange from the other side of the light) the problem is gone so looks like the colour is a problem but why???