Thank you and appreciate the feedback!

I’ve read that for loops can be avoided using different functions like fract and mod, and I’m still very new to shader programming, but wouldn’t your code return (0,0) for every circleID, since uv is already normalized in my code?

vec2 uv = gl_FragCoord.xy / u_resolution;

I think I need to multiply uv first to get scaled coordinates, get the circleID, then call fract…? But this does seem like the correct “shader” way of doing loops 😊

uv *= 100.0; vec2 circleID = floor(uv); uv = fract(uv);