You can use the Select brush to 'mask' an area of sculpting so that only the desired area will be affected by the subsequent tool operations. Select the faces with the select brush, right-click and choose 'Make Group and Edit' to sculpt only the masked area. (Be sure Lock Boundary is enabled)
Performance and Frame Rate
Artisan sculpting may be limited by the inherent slowness of SketchUp and the API relative to other 3D modeling applications.
- Use slower strokes and use less detail where possible to maintain a useable refresh rate.
- Temporarily hide objects and geometry (or turn off tags) that are not being edited as SketchUp tends to be faster with less geometry visible.
- Use Sculpt Shading Mode and turn off 'Display Edges' for better performance.
- Use the Reducer Brush on flatter areas to reduce your polycount.
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