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Do not use a linear sampler on lightmapper when retrieving grid data. #87618

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Jan 29, 2024
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Do not use a linear sampler on lightmapper when retrieving grid data. #87618

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4 changes: 3 additions & 1 deletion modules/lightmapper_rd/lm_compute.glsl
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,8 @@ denoise = "#define MODE_DENOISE";

#VERSION_DEFINES

#extension GL_EXT_samplerless_texture_functions : enable

// One 2D local group focusing in one layer at a time, though all
// in parallel (no barriers) makes more sense than a 3D local group
// as this can take more advantage of the cache for each group.
Expand Down Expand Up @@ -152,7 +154,7 @@ uint trace_ray(vec3 p_from, vec3 p_to, bool p_any_hit, out float r_distance, out

uint iters = 0;
while (all(greaterThanEqual(icell, ivec3(0))) && all(lessThan(icell, ivec3(bake_params.grid_size))) && (iters < 1000)) {
uvec2 cell_data = texelFetch(usampler3D(grid, linear_sampler), icell, 0).xy;
uvec2 cell_data = texelFetch(grid, icell, 0).xy;
uint triangle_count = cell_data.x;
if (triangle_count > 0) {
uint hit = RAY_MISS;
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