ZBrush — Sculpting for MetaHuman

What to do in ZBrush so a sculpted historical likeness becomes a clean, animatable MetaHuman. ZBrush is used at two different moments, with opposite rules:

A. Likeness sculpt for Mesh to MetaHuman / From Custom Mesh

Geometry

• Scale and units. Work to real-world size: an adult head is about 22–24 cm crown to chin. Set export scale so the mesh arrives in centimetres and check it in Maya or Unreal before solving.
• Orientation. Face looking straight forward along the front axis, no tilt or turn. Mesh to MetaHuman fails on badly oriented meshes.
• Clean surface. No holes, non-manifold edges, stray vertices or self-intersections. DynaMesh freely while sculpting, then ZRemesher or Decimation Master for export.
• Vertex count. Mesh to MetaHuman recommends OBJ for meshes over about 200,000 vertices (large FBX files cause problems). A decimated mesh with polypaint is usually enough; fine detail goes in maps, not in the fitting mesh.
• Combine on import. Keep the head and eyes as separate subtools in ZBrush, but import with Combine Meshes in Unreal.

Face (neutral pose)

The neutral is the foundation of every expression: MetaHuman stores expressions as differences from it.

• Relaxed and symmetrical. Keep asymmetry only where the photographs show a permanent feature, and record it in the likeness log.
• Eyes open, sclera visible. The whites of the eyes must show, with clear separation between eyeball and eyelid. Model eyeballs as a separate subtool with white sclera. Closed or empty sockets break tracking.
• Lips sealed. Completely closed, with no gap and no intersection. Teeth, if modelled, sit behind the lips without poking through.
• Eyelids must not intersect the eyeballs or each other.
• Ears and nostrils clearly formed; extra camera frames of them help the solve.
• No hair volume. Sculpt the skull and hairline, not the hairstyle. Hair, beards and brows become grooms later. A hair mass on the forehead or cranium will be fitted as skull.
• Brows and lashes only as faint polypaint, never as geometry.

Texture / polypaint

• Provide a flat, unlit albedo (polypaint exported as a texture). Mesh to MetaHuman tracks better on an albedo-textured mesh.
• If there is no texture, use flat, front-facing, symmetrical lighting in the Identity viewport, and keep sclera clearly lighter than skin.
• Keep ambient occlusion, cavity and specular out of the albedo.
• Pores and wrinkles belong in normal or displacement maps baked from the high-resolution sculpt. MetaHuman 5.8's unbaked-texture controls let you bring custom maps in later.

Body (From Custom Mesh, MetaHuman 5.8)

• A-pose close to the MetaHuman A-pose: arms down about 45°, palms down or in, fingers separated, feet flat and slightly apart.
• Nude or tight-fitting. Loose clothing (skirts, robes, coats) makes the solver fit the garment silhouette, not the body. Sculpt the body under the costume and dress it later in Marvelous Designer.
• Realistic proportions. The solver is built from real human morphology; extreme proportions solve poorly and pinch in animation.
• Period body. Consider period posture and build (corsetry changes the torso silhouette, but sculpt the body and let the costume shape it).

Export checklist

• Real-world scale in cm, verified in Unreal
• Facing front, no tilt
• Eyes open, sclera white, eyelids clean
• Lips sealed, no intersections
• No hair geometry
• Clean, watertight, no stray vertices
• OBJ if over about 200k vertices
• Flat albedo exported; detail maps baked separately
• Body in A-pose, unclothed or tight-fitting
• Likeness log updated

B. Refining a MetaHuman in ZBrush (without breaking the rig)

After Mesh to MetaHuman and MetaHuman Creator, the character is exported with DCC Export and assembled in Maya (MetaHuman for Maya — Considerations). ZBrush is then used to push likeness further on the MetaHuman head itself.

• Import the exported head, sculpt, return the same mesh. No DynaMesh, ZRemesher, Decimation, Close Holes or anything that adds or removes points.
• Preserve vertex order. Use GoZ or OBJ/FBX round trips that keep order; test by re-importing onto the original in Maya as a blend shape.
• Use layers. One layer for the neutral correction; one layer per expression if sculpting expressions for the Expression Editor.
• Respect vertex semantics. An eyelid-edge vertex must stay on the eyelid edge; do not slide vertices across the lip line or eye corners. Move volume, not landmarks.
• Minimize the delta. Large moves far from the joints make expressions carry mass oddly; bigger shape changes belong back in Mesh to MetaHuman or Creator.
• Detail stays in maps. Bake new normal maps from a subdivided copy; send the level-1 mesh back.

Historical-likeness notes

Full research and rules: ZBrush — Likeness and Age Research.

• Early daguerreotypes are often mirror-reversed; check hair parts and asymmetries against other images.
• Sitters held still for long exposures; faces read as stern. The neutral should be relaxed, not the photograph's set expression.
• Match the dated self: the 1847 comet night needs Mitchell at 29, not the famous late-life portraits.
• Where evidence is thin (Absalom Boston), sculpt a documented type and say so on the label.

Owner: character artist. Tutorials: ZBrush — Tutorials · local: Tutorial — Starting a Head and Base Body in ZBrush (part A) · Tutorial — ZBrush No-Topology-Change Round Trip (part B) · textures: Tutorial — Flat Albedo from Polypaint · Tutorial — Baking Detail Maps for MetaHuman

Sources: Sources — 2026-09-19