Issues Mixing Color with Semitransparent Materials

Questions & Answers
1

I’m building a game that involves overlapping semitransparent colored blocks to create new colors. However, I’m finding that some of the color values are not coming out as they should, the most notable example being that when I overlay a semitransparent red cube with a semitransparent green cube, the resulting color is not yellow but rather a murky brown.
75195-screen-shot-2016-07-31-at-113508-am.png

Does anyone know why additive color principles would not apply properly in this situation?

Thanks

2

Because the default blend mode for transparent shaders is not additive blending, it’s alpha blending. If you want additive blending you should change:

Blend SrcAlpha OneMinusSrcAlpha

to:

Blend One One