roup(1) @binding(0) var default_sampler: sampler;
fn textureLoadGeneral(tex: texture_cube<u32>, coords: vec3u, level: u32) -> vec4<u32> {
    let sample_coords = coordToCubeSampleST(coords, params.levelSize);
    return vec4<u32>(textureGather(0, tex, default_sampler, sample_coords).w);
}
@group(0) @binding(0) var src_tex : texture_cube<u32>;