feat: Geometry refinement and PBR textures#1

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richiejp:pbr-textures

Commits on Jul 7, 2026

Flash-attention fallback in the flow DiTs (enables the HR cascade)

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1024 cascade: full high-resolution geometry path

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shape decoder: gather children on-host to halve the 1024^3 decode RAM

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Run the shape decoder on the GPU (~20x) with VRAM-aware placement

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Winding-robust dual-grid shading normals (kill the mesh "grain")

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Match the reference quad-diagonal tie-break (learned split_weight)

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PBR textures: weights + GGUF converters for the texturing stack

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PBR textures: reference e2e texturing harness (golden target)

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Commits on Jul 8, 2026

Commits on Jul 9, 2026