Modeling · Intermediate

Retopology

Rebuilding a messy model with a clean, lighter mesh on top

Also called Retopo

What is retopology?

Retopology is rebuilding a model’s mesh with clean, evenly spaced faces while keeping its original shape. Artists do it after sculpting, scanning or AI generation, because those meshes are dense and tangled. A clean mesh is lighter, easier to texture, and bends properly when animated.

Think of it like this

It is like tracing a detailed drawing onto fresh paper with fewer, neater lines: the picture stays the same, but it is far easier to work with.

Where it fits in a 3D project

  1. Create
  2. Surface
  3. Rig
  4. Animate
  5. Render
  6. Export

Create: Building the shape: modeling, sculpting, scanning or generating it.

Low poly6 facesMedium12 facesHigh poly40 faces
The same shape with more faces looks smoother and costs more to store and draw.

How retopology works

  1. 01Start with the dense mesh from a sculpt, scan or AI tool.
  2. 02Draw new faces over its surface, snapping each point to the original shape.
  3. 03Lay edge loops around eyes, mouths and joints so they bend well.
  4. 04Bake the fine detail from the dense mesh into a normal map for the new one.

Retopology vs decimation

PropertyRetopologyDecimation
What it doesRebuilds the mesh with clean facesDeletes faces automatically
ResultTidy quads that follow the formFewer, often messy triangles
SpeedSlow, partly by handSeconds
Good for animationYesRarely

Decimate static props and quick previews; retopologize anything that will be rigged, animated or textured by hand.

Where retopology is used

  • Turning a high-detail sculpt into a game-ready model
  • Cleaning up 3D scans and AI-generated models
  • Preparing a character for rigging and animation

Beginner tip

Use quads and keep them roughly square. Add extra edge loops only where the model bends, like elbows and knees, and keep flat areas sparse.

Terms related to retopology

Retopology FAQ

Why is retopology needed?
Sculpts, scans and AI models often have millions of uneven triangles. That is too heavy for games, hard to unwrap for textures, and deforms badly in animation. Retopology gives a light mesh with faces arranged to suit how the model moves.
Is retopology done by hand?
Often partly. Automatic remeshing gives a quick first pass, and artists fix the areas that matter, such as faces and joints. Hero characters are still commonly retopologized by hand.
Do AI-generated 3D models need retopology?
Usually, if they will be animated or used in a real-time engine. For a still render, a background prop or a quick concept, the generated mesh is often fine as it is.

Updated October 29, 2026 · Browse all 3D terms