ZBrush Tip: Smooth Stronger for Fast Hard‑Surface Plane Cleanup

For fast, crisp plane cleanup on hard-surface models, switch your smoothing to Smooth Stronger. It removes waviness quickly while preserving intent when paired with polygroups and creases.

• Access: Hold Shift to activate smoothing, then click the Brush icon while still holding Shift and select “Smooth Stronger.” Release Shift to return to your previous sculpt brush.
• Starting settings: ZIntensity around 40–60, Draw Size small-to-medium for local control, Focal Shift around -20 to -40 for tighter falloff.
• Protection: In the Smooth Stronger brush, enable Auto Masking > BackfaceMask (thin shells) and set Mask By Polygroups to 100 (prevents bleeding across panel borders).
• Subdivision strategy: Step down to a lower SDiv before smoothing to avoid rippling fine details; step back up to refine.

Stroking technique

• Short taps and short drags are better than long strokes; they “iron” planes without rounding edges.
• Stay inside the plane you’re cleaning. Don’t traverse across major edges unless they’re creased or protected by polygroups.
• Feather at borders: reduce pen pressure as you approach edges to avoid beveling them.

Pair it with the right helpers

• Creases: Tool > Geometry > Crease (or Crease PG) to lock sharp breaks. Smooth Stronger then refines the adjacent planes without collapsing the edge.
• Polish stack: Use HPolish or TrimDynamic after Smooth Stronger to reassert flatness and remove remaining chatter.
• Polish by Features: Deformation > Polish by Features at low values (2–10) tidies planes globally without erasing design lines.
• Smooth Groups or Smooth Directional: If you must stroke across borders, temporarily switch to these smooth variants to respect polygroup boundaries and edge flow.

Advanced brush tuning

• Alternate smoothing: Assign an alternate algorithm in Brush > Smooth Brush Modifiers, then hold Shift+Alt to invoke it for stubborn ripples.
• Min Connected: Increase slightly when working near tight gaps to reduce vertex “pull-through.”
• Store a preset: Save a dedicated Smooth Stronger with your Auto Masking and falloff dialed in for repeatable results.

Micro-workflow for panel cleanup

1. Auto-group your model (Tool > Polygroup > Auto Groups) and crease key seams (Crease PG).
2. Drop to a lower subdivision level.
3. Use Smooth Stronger with BackfaceMask and Mask By Polygroups to iron planes.
4. Switch to HPolish to lock in flats; use DamStandard or Pinch to re-tighten micro seams if needed.
5. Step up one subdivision; do a second pass with lighter Smooth Stronger taps.
6. Finish with Polish by Features (low) for global consistency.

Troubleshooting

• Rounded edges: Re-crease, reduce Draw Size, lower ZIntensity, and keep strokes inside the plane.
• Surface tearing at holes: Enable BackfaceMask and use smaller strokes from the interior outwards.
• Wavy reflections: Alternate short Smooth Stronger taps with HPolish; check normals and apply a quick Relax (via an alternate smooth) if needed.

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