Mandatory review gate for any mesh or asset created or edited in Blender. Detects z-fighting (coplanar overlaps), floating/detached parts, inverted or inconsistent normals, non-manifold/open geometry, degenerate faces, duplicate verts, n-gons, unapplied scale, UV problems, bad skin weights, and renders multi-angle review sheets. Use before calling any modeling, export or delivery task done.
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Never assume a generated or edited mesh is correct. Check it with numbers, then look at it.
scripts/qa_check.py -- --objects Body Head Hat --profile game
Profiles: game (default), render (lenient), print (watertight required), roblox (20k tris/mesh, watertight, no n-gons, ≤4 influences).errors entry (table below), then re-run until "pass": true. Each warning must be either fixed or explicitly accepted, with the reason reported to the user.look with mode="angles" on the targets, once in material/solid shading and once in wireframe. Use xray for internals.scripts/review_shots.py -- --objects ... --mode random (one color per object, which makes detached pieces obvious), then --mode wire for topology. Open the returned PNG.| Finding | Cause | Fix |
|---|---|---|
zfighting A<->B | two surfaces facing the same way within --eps (1 mm) that overlap | delete the hidden duplicate, or offset ≥ 2–5 mm along the normal, or boolean/merge them |
back_to_back | faces touching with opposite normals (boxes glued face-to-face) | delete the hidden faces (wasted tris, bake artifacts) |
floating | island/object not touching any other part within --tol | move it to make contact (snap), bridge it, or join and merge. If floating is intended (sparks, UI), check it separately |
enclosed | part fully inside another, not touching (eyes, internal mechanics) | usually fine. Confirm it's intended |
inside_out_islands | closed part with normals pointing in | mesh.normals_make_consistent(inside=False) on that part |
inconsistent_normals_edges | neighbouring faces wound in opposite directions | recalc normals; if it persists, look for non-manifold seams |
nonmanifold_edges / wire_edges | >2 faces per edge, or stray edges | dissolve/delete the extra faces; delete_loose |
boundary_edges | open holes (bad for print/Roblox/bakes) | fill (fill_holes/edge_face_add) or cap |
degenerate_faces / zero_length_edges | collapsed geometry | dissolve_degenerate(threshold=1e-4) |
duplicate_verts | unwelded seams | remove_doubles(threshold=1e-4) (Merge by Distance); check UV seams after |
ngons | faces with >4 sides | triangulate/quadrangulate locally; n-gons are fine only on flat hard-surface faces that never deform |
| unapplied/negative scale | object transform | transform_apply(rotation=True, scale=True); negative scale flips normals on export |
uv_maps: 0 / zero-area UV / overlap | missing or bad unwrap | blender-retopology-uv |
| unweighted / >4 influences | skinning | blender-character-rigging (weights_check.py) |
ground_z ≠ 0 | asset floats or sinks | move the origin to the bottom and set z = 0 (props) |
ob.dimensions).xray).--eps is the z-fight distance. Raise it to 0.005 for large environment scenes, and lower it to 0.0002 for tiny jewelry.--tol is the contact tolerance for detached parts. Raise it for chunky kitbash.--no-modifiers checks the base mesh. By default the evaluated (modifier) result is checked, which is what gets exported.--max-tris (300k), the z-fight and floating checks are skipped. Check high-poly sources per part instead.No reviews yet. Tell others what you thought.
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Write Blender 5.2 add-ons as extensions - blender_manifest.toml, operators/panels/menus/property groups/preferences, bpy.props rules after 5.0, undo/redo, modal and timer patterns, gpu drawing (no bgl), bundling Python wheels, CLI validate/build/install, testing headless, extensions platform publishing. Use when creating or fixing a Blender add-on, tool, or UI.
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Animation in Blender 5.2 - slotted/layered actions and the channelbag API, Python keyframing, F-curves, game loops, NLA clips, pose library, mocap/BVH retargeting via constraints, baking control rigs to export skeletons, root motion, per-clip export. Use for any keyframe, action, NLA, mocap, or animation-export task.
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Character rigging in Blender 5.2 - Rigify metarig fit/generate, bone naming/roll/collections, DEF/MCH/control layers, IK/FK, robust skinning (heat + proxy fallback), weight-painting rules, correctives, engine game skeletons (Unity, Unreal, Roblox R15), rig validation and deformation stress tests. Use for armature, skinning or weights tasks.
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Foundation for any Blender 5.2+ task an agent drives - running bpy via MCP (live) or headless CLI, context overrides, locale-safe node lookup, enum discovery, 5.x API changes, verification. Use first for any Blender, bpy, .blend or 3D-asset request; routes to the specialized blender-* skills.
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Export from Blender 5.2 with verified presets - Roblox (FBX/glTF, cages, R15, SurfaceAppearance), Unity (FBX, Humanoid), Unreal (FBX skeletal, Nanite, UCX), Godot/web (GLB, meshopt/Draco, WebP), USD. Scale/axes, smoothing, tangents, leaf bones, clips, batch export, post-export verification. Use whenever an asset leaves Blender.
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Facial rigs and shape keys in Blender 5.2 - ARKit 52 blendshapes, visemes for lip-sync, sculpting expressions, splitting symmetric shapes into Left/Right, mirroring, corrective and combination shapes, drivers and control rigs, bone+blendshape hybrids, export to engines (Unity, Unreal, Roblox dynamic heads, VRM/web). Use for faces, expressions, lip-sync, or any shape-key work.
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