[LOGGED] More blend modes needed in Projector Actor

[Keve]

I would love to see the ability to use more blend modes than "opaque", "transparent" and "additive". 

I miss options like "multiply", "screen", "difference", etc. 

I know about the Effect Mixer Actor and its possibilities. It defies its purpose if I want to map each Projector via IzzyMap.

It would make compositing much more easier!

(Sorry if this issue has already been discussed.)

[dansfine]

@keve I just posted the same exact thing!