Cutting a model directly in Sculpt Mode is one of the cleanest ways to separate parts without breaking your workflow. Instead of switching back to Edit Mode, you can isolate any area with a mask and use Mask → Mask Slice to New Object to split the mesh instantly.
In this mini breakdown, here are the essential steps:
1. Create a clean mask
Use Box, Lasso, or Line Mask depending on the shape you need. Line Mask is great for sharp, precise cuts. Remember: Shift adds to the mask and Ctrl subtracts.
2. Slice the mesh
Run Mask Slice to New Object to split the model into two closed, independent objects — perfect for sculpting arms, heads, or accessories as separate parts.
3. Fix topology with Voxel Remesh
A quick remesh removes artifacts created by the cut and rebuilds a clean, uniform mesh. It’s ideal before adding secondary or fine details.
4. Clear your mask
Don’t forget Alt + M before creating a new one — leftover masks are a common source of confusion.
5. Smooth the edges
With the Mesh Filter set to Smooth, lightly blend the cut borders to achieve a more natural transition.
This workflow is perfect during the blocking and primary forms phase, when you need flexibility and fast iterations.
👉 Full step-by-step tutorial with screenshots available here:
https://3dskillup.art/how-to-cut-a-model-in-blender-sculpt-mode/