Here I have two basic sprites. One red, one blue. I also have a basic 2D light. As I move the colour wheel around, the light only illuminates the sprite with colour in the matching RGB channel. Ie it lights up the blue sprite when the light is blue, and the red one when the light is red.
What I expected is that the light illuminates both sprites, regardless of colour. If I set both sprites to white, the light illuminates them both. If it’s green, they are both dark. What gives?