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arjun988/blender-skills359Updated Jul 11, 2026
FreePublished on GitHub
collision-proxy
Collision proxy authoring for games including UCX/UHX naming, convex hulls, capsules, and simple collider meshes in Blender via MCP.
The English summary is being prepared. Showing the original description.
Works withBlender
See how to installFiles included (3)
- SKILL.md2.2 KB
- references/collider-recipes.md299 B
- references/engine-naming.md201 B
SKILL.md (original)
Review the instructions the agent will receive before you install.
Collision Proxy
Simple, stable colliders. Prefer primitives and convex pieces over render mesh.
When to Use
- Game physics / blocking volumes
- Unreal UCX export
- Unity mesh or primitive colliders
- Hitboxes for interactables
Workflow
Identify collision needs → Build proxies → Name correctly
→ Test overlaps → Export with render mesh
Collider Types
| Type | Use |
|---|---|
| Box | Crates, walls, simple props |
| Capsule | Characters, poles |
| Sphere | Balls, soft approximates |
| Convex hull | Organic / irregular single body |
| Multiple convex (UCX) | Vehicles, complex props |
Unreal Naming
UCX_SM_Asset_01
UCX_SM_Asset_02
- Must match associated mesh naming rules for auto-association
- Convex only for UCX
Unity Notes
- Prefer engine primitives when possible
- Mesh colliders: convex toggle for dynamic rigidbodies
- Keep proxy collection exportable
Authoring Rules
- Slightly smaller than visual mesh to reduce snagging (project-dependent)
- No holes; watertight convex pieces
- Apply scale
- Origin aligned with render mesh
- Collection:
COL_Collision_[Asset]
Validation
- Player cannot fall through intended blockers
- No huge invisible walls beyond mesh
- Wheel/character capsules oriented correctly
- Named for target engine
Constraints
MUST DO
- Prefer few simple shapes over one complex mesh
- Match engine naming conventions
- Keep proxies in dedicated collection
MUST NOT DO
- Use render LOD0 as physics mesh by default
- Non-convex UCX for Unreal auto-convex workflows
Reference Guide
| Topic | Reference | Load When |
|---|---|---|
| Collider Recipes | references/collider-recipes.md | When needed |
| Engine Naming | references/engine-naming.md | When needed |
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