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fix(ugc): glitter flecks look like LEGO glitter

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The fleck texture was 50 soft round blobs of one size, bright in the
middle and fading out, which read as a smudgy dot pattern. LEGO's glitter
bricks have many small flat flakes (about half a millimetre) of which
most look faint and a few catch the light. The flecks are now flat
flakes of glitter_fleck_size (0.05 model units, i.e. 0.5 mm; 0.7 to 1.3
of it) with a one-pixel edge, each as bright as its facet catches the
light (0.3 to 1 of glitter_fleck_opacity, 80%, weighted towards dim),
80 a tile by default. The texture grows (128 to 512) to keep a fleck 3
pixels wide. New settings glitter_fleck_size and glitter_fleck_opacity;
glitter_density defaults to 80. Only glitter output changes.

Check in game: reprocess a glitter model; close up, the flecks are small
crisp flakes of varied brightness, not blurry dots; from a few metres
the brick still reads as its color with a fine glitter.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Aaron Kimbrell
2026-09-29 00:35:48 -05:00
parent fb7850fb9f
commit aab161038e
10 changed files with 90 additions and 51 deletions
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2
dUgcServer/Render/UgcRender.cpp
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@@ -358,7 +358,7 @@ namespace UgcRender {
for (const auto* mesh : { &model.opaque, &model.transparent }) {
anyGlitter = anyGlitter || std::find(mesh->looks.begin(), mesh->looks.end(), UgcModel::eLook::GLITTER) != mesh->looks.end();
}
const auto glitterAlpha = anyGlitter ? UgcGlitter::FleckAlpha(options.glitter.flecks) : std::vector<uint8_t>{};
const auto glitterAlpha = anyGlitter ? UgcGlitter::FleckAlpha(options.glitter) : std::vector<uint8_t>{};
const auto shade = [&](const UgcModel::Mesh& mesh, bool isOpaque, uint32_t i0, uint32_t i1, uint32_t i2, float w0, float w1, float w2) {
glm::vec3 normal(0.0f, 1.0f, 0.0f);