PolyHavenMaterialBuilder now removes the separate roughness map (asset +
meta) once its data has been packed into the generated
_metallic_smoothness.png; skipped when the repack fails or roughness came
from the ARM texture.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Tools/Poly Haven Importer: fetches asset metadata/files via the public
Poly Haven API, browsable texture catalog with searchable thumbnail
grid, per-map resolution selection, async non-blocking downloads, and
automatic URP/Lit material build (roughness->smoothness repacking into
_MetallicGlossMap, ARM unpacking as fallback for missing AO/Rough/Metal
maps, linear import settings for data textures). Thumbnails survive
play mode via HideAndDontSave + destroyed-cache recovery.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
adminandClaude Fable 5