I'm in the middle of my project now, but am pounding my head that I couldn't remember how I did this in the past. I have a car on an object which will eventually be placed over a still of that base object in Premiere. In the past, I figured out a way to export that car AND the shadow as one piece, RGBA sort of thing. The closest I was able to get before having to abandon ship and start rendering a separate pass for the shadows, is the vehicle with a shadow, but you can still see the form of the base object it is sitting on.
I apologize I can't post details or files yet, but wanted to put it out there. I put a Shadow Catcher Material on the base object and of course the setting inside there is where I'm sure I'm missing something, but I have tried multiple combinations of Environment/Sky Object/Compositing, Backplate/...... then I enable Multi-Pass and add Mask, Alpha, Shadows and anything else I can think of.
One question on Multi-Pass. If I enable a bunch of passes, does that add to render time, or is Corona rendering that info anyway and I'm just separate them?
Thanks for any tips.
--Alex
