M2.5: wire libgr2 dump_materials (opt-in), keep filename heuristic default

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- Metin2Model stores gr2::dump_materials() and can resolve surface textures
  via tri_groups[0].material_index -> material.diffuse_texture basename,
  gated behind use_gr2_materials (default off): the mapping is unverified and
  currently regresses warrior (body surfaces pick the face texture), so the
  filename-convention + dir-scan path stays the default.
- Property + setter for use_gr2_materials so it can be A/B'd once a Granny
  oracle exists. Logged: "gr2 materials: N (M with diffuse name)".

warrior/assassin/shaman render unchanged from the heuristic path.
docs/GODOT-POC-PLAN.md §M2.5 T2.5.6 gap list already covers the open item.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WaHYEY9rwLWt21PULiYjeJ

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Claude

2026-08-29 09:41:32 +09:00

parent eeffa2a730

commit 83c48f0c14

7 changed files with 72 additions and 1 deletions

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