Thank you for your advice.
There are some good videos on this website!
But I can't see how quadtrees could help.
My current solution consists of a rendertarget in which the fixed pixels are saved. And the moving pixels are represented as particle…
I'll take a closer look at the particle system.
I wanted to recognize collisions myself. Are just individual pixels. I have an extra array in LUA for this.
I'm already doing something similar for drawing. With a twice as high rendering targ…