[PR #153] [MERGED] kb: Just Cause 3 vehicle mesh editing: displacement works; our count-changing edits crashed #166

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opened 2026-10-15 20:53:57 +00:00 by bsakaguchi · 0 comments

bsakaguchi commented

2026-10-15 20:53:57 +00:00

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📋 Pull Request Information

Original PR: https://github.com/rehan-remade/universal-modder/pull/153
Author: @NotTrevino
Created: 10/8/2026
Status: ✅ Merged
Merged: 10/10/2026
Merged by: @rehan-remade

Base: main ← Head: kb/just-cause-3-vehicle-mesh-editing-displacement-works-adding-geometry-does

📝 Commits (7)

34106f5 kb: Vehicle mesh editing: displacement works, adding geometry does not (Just Cause 3)
28dc708 kb: correct the .epe conclusion -- the property converter is usable
814a4c8 kb: rule out the two blamed mechanisms for the geometry crash
d3c7b81 kb: finalize after bisection (both count changes crash)
e40212e kb: Just Cause 3 vehicle mesh editing: review fixes
92420c7 Merge remote-tracking branch 'origin/main' into land/pr-153
95c7629 kb: regenerate the index

📊 Changes

3 files changed (+464 additions, -1 deletions)

View changed files

📝 knowledge/INDEX.md (+2 -1)
➕ knowledge/games/just-cause-3/vehicle-mesh-editing-displacement-works-adding-geometry-does.md (+419 -0)
📝 knowledge/index.json (+43 -0)

📄 Description

…t (Just Cause 3)

Adds the first Just Cause 3 field note. Reshaping a vehicle by rewriting vertex positions works and runs in the real game; adding new geometry crashes, because the engine validates the entity's structure at load and the body's collision is a Havok hknpExternMeshShape bound to the render mesh.

Records the structural-validation table, the part-name binding scheme, and eleven gotchas: the .epe converter silently destroying 631 placeholder sentinels, SmallPack's @files.xml manifest trap, JCMR being unable to read vehicle RBMs, the spawn-name property having no name, and checking the OS crash log's faulting module before blaming your own build on hybrid graphics.

What:

Checklist

um kb check passes (field notes) / uv run --with pytest pytest -q tests passes (code)
um kb index regenerated (field notes)
no game files, extracted assets, decompiled code dumps or secrets
nothing that cheats other players or bypasses anti-cheat / DRM / ownership checks
versions, verification and what was NOT verified are written down
authored by (agent + model / human):

_{🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.}

## 📋 Pull Request Information **Original PR:** https://github.com/rehan-remade/universal-modder/pull/153 **Author:** [@NotTrevino](https://github.com/NotTrevino) **Created:** 10/8/2026 **Status:** ✅ Merged **Merged:** 10/10/2026 **Merged by:** [@rehan-remade](https://github.com/rehan-remade) **Base:** `main` ← **Head:** `kb/just-cause-3-vehicle-mesh-editing-displacement-works-adding-geometry-does` --- ### 📝 Commits (7) - [`34106f5`](https://github.com/rehan-remade/universal-modder/commit/34106f50df921c5dcfea6a00bb8482cdff35c789) kb: Vehicle mesh editing: displacement works, adding geometry does not (Just Cause 3) - [`28dc708`](https://github.com/rehan-remade/universal-modder/commit/28dc708aaf2669b69bc671f32083c4f842293d52) kb: correct the .epe conclusion -- the property converter is usable - [`814a4c8`](https://github.com/rehan-remade/universal-modder/commit/814a4c80a21357e0eb14d4bc1c76df4643706d1a) kb: rule out the two blamed mechanisms for the geometry crash - [`d3c7b81`](https://github.com/rehan-remade/universal-modder/commit/d3c7b8153b617e9f983e29a25589423124e0551e) kb: finalize after bisection (both count changes crash) - [`e40212e`](https://github.com/rehan-remade/universal-modder/commit/e40212ec5817129960e0ef13a21ab04ca270aa65) kb: Just Cause 3 vehicle mesh editing: review fixes - [`92420c7`](https://github.com/rehan-remade/universal-modder/commit/92420c757f85f9d1d09fff2d53134774a5013252) Merge remote-tracking branch 'origin/main' into land/pr-153 - [`95c7629`](https://github.com/rehan-remade/universal-modder/commit/95c762939aa509e8396732a6b44154f32d75b5f3) kb: regenerate the index ### 📊 Changes **3 files changed** (+464 additions, -1 deletions) <details> <summary>View changed files</summary> 📝 `knowledge/INDEX.md` (+2 -1) ➕ `knowledge/games/just-cause-3/vehicle-mesh-editing-displacement-works-adding-geometry-does.md` (+419 -0) 📝 `knowledge/index.json` (+43 -0) </details> ### 📄 Description …t (Just Cause 3) Adds the first Just Cause 3 field note. Reshaping a vehicle by rewriting vertex positions works and runs in the real game; adding new geometry crashes, because the engine validates the entity's structure at load and the body's collision is a Havok hknpExternMeshShape bound to the render mesh. Records the structural-validation table, the part-name binding scheme, and eleven gotchas: the .epe converter silently destroying 631 placeholder sentinels, SmallPack's @files.xml manifest trap, JCMR being unable to read vehicle RBMs, the spawn-name property having no name, and checking the OS crash log's faulting module before blaming your own build on hybrid graphics.  **What:**  **Checklist** - [ ] `um kb check` passes (field notes) / `uv run --with pytest pytest -q tests` passes (code) - [ ] `um kb index` regenerated (field notes) - [ ] no game files, extracted assets, decompiled code dumps or secrets - [ ] nothing that cheats other players or bypasses anti-cheat / DRM / ownership checks - [ ] versions, verification and what was NOT verified are written down - [ ] authored by (agent + model / human):  --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>

bsakaguchi

2026-10-15 20:53:57 +00:00