So, I hit a wall with this. I’m new to the Arnold render world and quite happy with the results it produces. Let me get to the point.
Okay. I have a camera move backplate that needs to feature a car on it. I worked on the car and while it still needs some kinks worked out I wanted to see it on the backplate that is provided. I used a similar hdr to light the car and used it for my initial renders as a background but for my final sequence i want the background hdr (skydome light) turned off. I don’t want it to show up in the alpha. I thought that a simple switch can help me but it turns out it doesn’t function like that. Is there a way to turn the hdr in the background in a way that it still affects the reflections but the cars glasses are transparent and not show the bg?
I added a render with the hdr and the backplate in a mockup to illustrate the point. The left side is the hdr skydome and the right side is just a quick mockup of the backplate that should be in the final composite. The glass surfaces still show the hdr in the bg. I need to have the backplate showing up.
A quick resolution would be favourable, I will take any advice at this point.