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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/Formats/UgcFormats.cpp
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@@ -361,7 +361,7 @@ namespace {
// function would do with it is what LEGO-AnimUV does: the texture over the vertex color by its alpha, the
// vertex alpha kept), with the texture transform LEGO-AnimUV reads
int32_t GlitterTexturing(const UgcGlitter::Params& glitter) {
if (m_Glitter < 0) m_Glitter = Texturing(StoredTexture("ugc_glitter.dds", UgcGlitter::Mipmaps(UgcGlitter::FleckAlpha(glitter.flecks))), 1 << 1, true);
if (m_Glitter < 0) m_Glitter = Texturing(StoredTexture("ugc_glitter.dds", UgcGlitter::Mipmaps(UgcGlitter::FleckAlpha(glitter))), 1 << 1, true);
return m_Glitter;
}