I'm toying with an idea in my head for a 2D game that involves a fluid like substance on the screen that changes color and moves as sprites move over (or "through") it. In my research I came across a few other games that do something similar to what I'm thinking.
One that I quite like is an old game called Plasma Pong. Here is an example.
From what I understand in this game he is using proper fluid dynamics, which is probably overkill for what I'm thinking. But the effect is similar. I'm thinking perhaps a pixel shader applied to a full screen quad. Then use a render target to set pixels for the position and color of the sprites on the screen. The pixel shader can then use this render target texture to change the "plasma" so it moves and changes color.
Would an approach like this work? I'm not a shader expert so just not sure where to start with this.