I’ll try explaining in Godot terms since that’s the engine I’ve used. The entire game has a ColorRect as an overlay and it’s got a shader on it. That shader is a modified version of this one: https://godotshaders.com/shader/2d-drop-shadow/
Ah, nice! Makes sense to do indiscriminate shadows of everything when you're going minimal! I didn't think you could apply a shadermaterial to a gpuparticle.
