Add 7. Contributor Submission Checklist

7.-Contributor-Submission-Checklist.md

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+# Contributor Submission Checklist
+
+Use this checklist before submitting a 3D model contribution.
+
+## Required files
+
+Unless an issue says otherwise, include:
+
+- Blender source file
+- Exported GLB file
+- Blender screenshot
+- Godot screenshot at normal gameplay camera distance
+- Dimensions
+- Material list
+- Collision notes
+- Related issue number
+
+## Submission notes
+
+Example:
+
+    Dimensions:
+    - Small rock: 0.7 m wide
+    - Medium rock: 1.3 m wide
+    - Large rock: 2.2 m wide
+
+    Materials:
+    - mat_stone_light
+    - mat_stone_dark
+    - mat_moss
+
+    Collision:
+    - Not included
+
+## Checklist
+
+- [ ] Correct repository directory
+- [ ] Blender source included
+- [ ] GLB export included
+- [ ] Scale uses 1 unit = 1 meter
+- [ ] Rotation applied
+- [ ] Scale applied
+- [ ] Object scale is `1,1,1`
+- [ ] Origins placed intentionally
+- [ ] Objects named clearly
+- [ ] No default `Cube.001` object names
+- [ ] No missing textures
+- [ ] No unnecessary textures
+- [ ] No external asset dependencies
+- [ ] No generative-AI-created assets
+- [ ] No unnecessary cameras
+- [ ] No unnecessary lights
+- [ ] Godot import tested
+- [ ] Compatibility renderer tested
+- [ ] Gameplay-camera screenshot included
+- [ ] Dimensions documented
+- [ ] Materials documented
+- [ ] Collision documented
+- [ ] Related issue referenced
+- [ ] Asset is original or properly licensed
+
+## Pull request description
+
+The pull request should explain:
+
+- What was created
+- Which issue it addresses
+- Where the source files are located
+- Where the exported files are located
+- Whether collision is included
+- Whether textures are included
+- Any known limitations
+
+## Questions to ask before modeling
+
+Ask for clarification when needed:
+
+- Should collision be included?
+- Should the model be modular?
+- Is it a unique asset?
+- Does it need animation?
+- Which colors should be used?
+- Are textures permitted?
+- What is the target size?
+- Where will the asset appear?
+- Does it need several variants?
+
+Clarifying a small requirement early is better than rebuilding a finished asset.