Green screen render

What’s the best method to render out a scene with green screen element behind the character subject? Is there an alpha color render setting?

Thank you!

The smartass/hacky part of me wants to say you just put an unlit green material on a quad behind the character. I am 100% sure there are more elegant solutions, but I also think that would get the job done.

The issue with unlit green materials (or anything other than black) is you’ll get bloom, making it harder to remove later.

If this is for offline rendering, then the movie render graph (MRG) is ideal for this. Instead of rendering with a green screen, you can use MRG’s layers to output the background as transparent. Then there’s zero keying, color bleed, etc. that needs to be handled after rendering.

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That is definitely a better idea than mine.