DCC production guide
Mesh Merge and Simplification Guide
Direct answer: Merge meshes to reduce object count, draw calls, or authoring complexity only when the merged asset still preserves pivots, materials, UVs, collision, and streaming needs. Simplify meshes to meet budgets only after deciding which silhouette, sockets, and gameplay surfaces must be protected.
Mesh MergeMesh SimplificationAutomatic LODTriangle BudgetVertex Budget网格合并网格简化
When mesh merge helps
Merge small static pieces that always move, load, and render together: bolts on a crate, decorative panels on a wall kit, or rubble pieces baked into one background prop. Do not merge parts that need separate animation, damage states, materials swaps, sockets, culling, or gameplay interaction.
Simplification priorities
Protect silhouette, deformation boundaries, UV seams, contact surfaces, and recognizable design marks. Reduce flat internal detail first. For LODs, remove small bolts before changing the main outline. For scan cleanup, decimate broad noisy surfaces more than edges or facial details.
Material and UV risks
Merging can increase material slots or break lightmap density if each source used different UV assumptions. Simplification can stretch UVs, destroy baked normals, or move vertices away from the high-poly bake. Recheck texture seams and lightmap channels after the operation.
Engine validation
Compare draw calls, triangle count, runtime vertex count, bounds, culling behavior, collision, and LOD transitions before and after. A merged mesh with one fewer object can still perform worse if it creates a huge bounding box that renders when mostly offscreen.
Worked example
A modular market stall has twenty small static planks. Merge planks that share material and never animate, but keep the cloth awning separate if it swaps color or simulates wind. Simplify plank backside faces that the camera never sees, keep front silhouette chips, and regenerate LODs from the merged result.
Multilingual production terms
Use this mesh merge simplification guide terminology table when writing review comments, export notes, or handoff instructions across Chinese, English, and Japanese teams.
| 中文 | English | 日本語 | Workflow usage note |
|---|---|---|---|
| 网格合并 | Mesh Merge | メッシュ結合 | Use these terms when combining static parts or reducing geometry while preserving culling and materials. |
| 网格简化 | Mesh Simplification | メッシュ簡略化 | Use these terms when combining static parts or reducing geometry while preserving culling and materials. |
Term notes
Related multilingual terms on this page are technical anchors, not one-to-one translations: Mesh Merge / Mesh Simplification / Automatic LOD / Triangle Budget / Vertex Budget / 网格合并 / 网格简化. Keep local-language notes beside the English production term when writing DCC tasks.
Related pages and next step
Open SEELE AI workspaceFAQ
Does mesh merge always improve performance?
No. It can reduce object count but harm culling, material batching, collision, or streaming if used blindly.
What should not be merged?
Do not merge parts needing separate animation, damage, sockets, material swaps, or gameplay interaction.
Can simplification break baked maps?
Yes. If the low-poly surface changes too much, normal, AO, and curvature bakes may no longer match.
Which counts should be recorded?
Record object count, triangle count, runtime vertex count, material slots, LODs, and bounds before and after.