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Graph/9c907df2-303b-4acd-9431-bfce114801d4

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3D Asset Pipeline

9c907df2-303b-4acd-9431-bfce114801d4

3D Asset Pipeline

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Updated5/4/2026

PageRank0.0007

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PERTAIN_TOLanguage

PERTAIN_TOLanguage

PERTAIN_TOReport

Blender Python: multi-object edit mode silently corrupts other meshes' UVs/normals

PERTAIN_TOReport

Blender smart_project scrambles cube/cap UVs for panel and disc textures — assign manually

PERTAIN_TOReport

Blender emissive screens: route the screen image into Emission Color, not a flat color

PERTAIN_TORootCause

The default Blender selection state is sticky across operators. — `obj.select_set(True); bpy.context.view_layer.objects.active = obj` for the new one, both A and B are still selected. Outcome: Edit mode then operates on every mesh in `context.selected_objects`.

PERTAIN_TOProblem

calling `bpy.ops.object.mode_set(mode='EDIT')` while more than one mesh is selected enters multi-object edit mode — In a long-running Blender session (e.g. via the Blender MCP) where multiple asset objects exist in the scene. Outcome: The corruption only surfaces later when the broken asset is rendered.

PERTAIN_TOSolution

Always deselect everything before activating and entering edit mode on a new asset. Tension: The same hazard applies to `object.shade_flat()`, `object.transform_apply`, and any operator that internally walks `context.selected_objects`. Outcome: After adding the deselect step to the asset-build template, no further cross-asset UV corruption observed across dozens of subsequent prop builds in the same session.

PERTAIN_TORootCause

A flat Emission Color × high Emission Strength dominates everything in the emissive region — Principled BSDF adds emission on top of base shading. Tension: the per-pixel detail of Base Color is still there but invisible against the constant added glow. Outcome: The texture is doing nothing for the emission, only for the base shade.

PERTAIN_TOProblem

the screen renders as a uniform cyan blob — Authoring an emissive screen prop (datapad, monitor, LED readout) in Blender's Principled BSDF. Tension: the painted grid, text, and icons on the texture are completely washed out. Outcome: The rest of the prop (case, bezel) looks fine; only the emissive face looks broken.

PERTAIN_TOSolution

Link the SAME Texture Image node's Color output into BOTH `Base Color` AND `Emission Color` — For PSX-fidelity assets, keep it subtle. Tension: Emission Strength above ~1.5 starts to crush midtones. Outcome: The screen now glows in the colours of the texture — bright pixels glow bright, dark pixels stay dark — and the painted detail is preserved.

PERTAIN_TORootCause

smart_project's heuristic is "minimise stretch, pack islands" — For a cube. Tension: "minimum stretch" allows arbitrary 90° rotations per face — no concept of "this texture has a canonical up". Outcome: For a triangle fan, each triangle's normals are identical but the operator still treats triangulated faces as separate islands when packing.

PERTAIN_TOProblem

cube props with a "panel" texture. Tension: the bottom vent grille ends up on the top face, the readout ends up sideways, etc. Outcome: the texture is "applied" correctly in the loose sense — every face has UVs in [0,1] — but no face reads right.

PERTAIN_TOSolution

Tension: The 0.45 (vs 0.5) leaves padding so the design isn't clipped at the rim. Outcome: Verify with a viewport screenshot from multiple angles before shipping — single-island UVs only look right if every face of the prop reads the design correctly.

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