const uint local_x = gl_LocalInvocationID.x % 8;
const uint local_y = (gl_LocalInvocationID.x / 8) % 8;
const uint local_z = gl_LocalInvocationID.x / 64;
const uint local_x = gl_LocalInvocationID.x % 8;
const uint local_y = (gl_LocalInvocationID.x / 8) % 8;
const uint local_z = gl_LocalInvocationID.x / 64;