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James Dansereau
a2b2f78dd1
Root-caused the D397 interlaced/comb symptom on the file-select background and intro gun-barrel (first display, not round-trip): titleRenderFolderMenuBackgroundLines loads 299 one-pixel 440-byte I8 rows with gDPLoadTextureBlock(I, 8b) and samples G_TX_RENDERTILE but never emits gSPSetTile, so the tile's fmt/siz is whatever the previous screen left (CI/4b spectrum-screen leftover, D116 probe). fast3d ran the I8 bytes through import_texture_ci4 against a stale/all-zero 16-entry palette -> periodic black rows (GL texture-cache artifact, not a ground-truth dither — no ROM RLE decode needed). - gfx_pc.cpp import_texture: route the import through the source's fmt/siz when a CI/RGBA tile genuinely disagrees with an I8 8b load (mirrors the D229 case); real CI/RGBA textures untouched. - gfx_opengl.cpp: GE_D397SH env-gated shader-formula probe for the file-select gunbarrel combine (label initially written as D398, renamed to avoid the PC-Options-label finding collision). - findings: D397 row -> FIX LANDED (by-eye + PCDUMP verification owed); tail section notes the fix. CSV regenerated. Cross-ref D182(2) (same symptom family), D159/D183 (disproven leads), D229 (mirror-case precedent).