ZBrush Tip: Predictable ZRemesher Retopology for Clean UVs and Bakes

Streamline retopology with a fast, predictable ZRemesher routine that preserves form, sets you up for UVs, and keeps downstream baking clean.

• Prep the mesh for success
  • Duplicate your SubTool first to keep a high-res reference for projection.
  • Close micro gaps: use Tool > Geometry > Modify Topology > Close Holes (if needed), then Deformation > Polish by Features (low values) to reduce noise without softening silhouette.
  • Create meaningful PolyGroups: Tool > PolyGroups > Group by Normals (30–45°) for hard edges, or manually group key regions. These will guide edge flow and future UV seams.
• Core ZRemesher settings that matter
  • Target Polygon Count: set in thousands (e.g., 5 = ~5k). Start a medium pass around 10–30k for most characters/props.
  • Half/Double: use Half for iterative reductions while maintaining flow; avoid big jumps in one go.
  • KeepGroups + DetectEdges: on for hard-surface or when PolyGroups define features; off for blobby organics.
  • AdaptiveSize: lower (0–15) for uniform quads and hard-surface consistency; higher (40–60) for organics where detail density can vary.
  • Curve Strength: add ZRemesher Guides (Brush > ZRemesherGuides) around eyes/mouth/shoulders/cuffs; increase Curve Strength if loops aren’t respected.
  • Use Symmetry: enable X symmetry for mirrored assets to avoid mismatched loops.
  • Alternate solve: hold Alt when clicking ZRemesher to try a different topology solution if you see spirals.
  • Freeze Border (for open meshes): on to preserve border shapes when remeshing shells or garments.
• A reliable multi-pass workflow
  • Pass 1 (mid-density): ZRemesh to 10–30k to lock in clean loops and even quads.
  • Project detail: SubTool > Project > Project All from the original. Subdivide and project again at each level to recover form fidelity.
  • LOD creation: Use Half iteratively to derive 2–3 additional LODs (e.g., 20k → 10k → 5k) and Project All each step to keep silhouette.
  • UVs after topology: run UV Master using Polygroups to control seams; even quad distribution + smart seams yield cleaner bakes.
• Hard-surface pointers
  • Segment first: Group by Normals, then KeepGroups + DetectEdges with AdaptiveSize ~5–15.
  • Guide critical edges with curves on panel breaks and around chamfers to prevent meandering loops.
  • After remesh, use Crease PG and add slight bevels before subdivision to maintain crispness.
• Troubleshooting quick hits
  • Spiral or tangled loops: add guides, raise target count slightly, lower AdaptiveSize, try Alt-Remesh.
  • Softened borders: enable Freeze Border or increase DetectEdges, ensure PolyGroups are clean.
  • Lost micro-detail: project in smaller steps; subdivide first, then Project All with low Dist and a couple of clean-up passes.

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