#version 450 layout(local_size_x = 64, local_size_y = 1, local_size_z = 1) in; layout(set = 0, binding = 0) buffer Data { uint data[]; } data; void main() { uint idx = (gl_GlobalInvocationID.y * 720 + gl_GlobalInvocationID.x); data.data[idx+0] = 255; data.data[idx+1] = 0; data.data[idx+2] = 0; }