ZBrush Tip: ZBrush Crease + Divide Workflow for Hard-Surface Edge Preservation

Preserve hard-surface fidelity while subdividing by combining Crease and Divide intelligently. Here’s a focused workflow to maintain crisp edges without sacrificing sculptability.

• Identify hard edges: Before subdividing, decide which borders must remain razor-sharp (panel seams, chamfers, control cuts).
• Assign creases efficiently:
  • Use Tool > Geometry > Crease > Crease PG to crease by PolyGroups for broad coverage.
  • Use Crease by Angle to auto-crease edges above a set angle threshold.
  • For surgical control, ZModeler (Edge > Crease) lets you mark only the loops you need.
• Set Crease Level strategically: Tool > Geometry > Crease > Crease Level determines when a crease starts to relax across subdivision levels. Common baselines:
  • Crease Level 2–3: Preserves form through early divisions, then gently rounds at higher levels.
  • Crease Level 15 (or high): Keeps edges locked and hard across all levels.
• Divide with confidence:
  • Tool > Geometry > Divide with Smt on to smooth non-creased areas.
  • Ensure Keep Creases is active so subdivisions respect your marked edges until the set Crease Level.
• Preview vs. commit:
  • Use Dynamic Subdiv for a non-destructive preview (QGrid + Coverage to test bevel feel) before committing real subdivisions.
  • Apply when satisfied, then Project if needed to recover micro detail.

Practical targets:

• Concept blockouts: Crease PG + Divide to hold major planes while exploring silhouette.
• Production hard-surface: Manual creases on hero edges; Crease Level 2–3 for nuanced softening later.
• Mixed assets: Keep secondary edges creased; let tertiary edges round off to avoid an overly “CAD” look.

Troubleshooting:

• Edges rounding too early? Raise Crease Level or reapply creases after topology edits.
• Pinching at corners? Confirm clean quad flow; add supporting loops with ZModeler or use Group Loops on relevant PolyGroups.
• Artifacts after projection? Subdivide one extra level, reduce Projection distance/strength, and re-project incrementally.

Pro tips:

• Combine Crease by Angle with a quick manual pass to catch special-case loops (vents, countersinks, fillets).
• For printable parts, favor committed bevel geometry (via QGrid Apply or supporting loops) over infinite creases.
• Use Polyframe (Shift+F) to visually audit creased borders while you iterate.

Pipeline note: Creases are control rules, not exported geometry. For game/film bakes, preserve the hard silhouette with creases during sculpt, then ensure the final high-poly has physical support edges before baking normals.

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