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Could someone figure out how to create a custom delete brush in Sculpt Mode?

So when you click on geometry it erases the faces.

For example, delete the faces inside the red rectangle. So then you can smooth it with the "Smooth" brush: enter image description here

Thank you very much

Miguel

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  • $\begingroup$ I have no idea what a custom delete brush is. Why not add a brief description about it to your question? $\endgroup$
    – Blunder
    Commented Feb 14, 2023 at 17:14
  • $\begingroup$ Yes, sorry. Now it's updated $\endgroup$
    – Miguel
    Commented Feb 14, 2023 at 17:58
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    $\begingroup$ Thanks for the update of the question. So you want a brush that can paint holes into the mesh? "Holes" means deleted faces and the mesh will no longer be manifold (watertight). I'm just wonder because usually you want to avoid holes in a high-poly sculpted mesh. They only cause problems. $\endgroup$
    – Blunder
    Commented Feb 14, 2023 at 18:07
  • $\begingroup$ Thank you, Blunder. Not holes but protuberances/bumps. Sorry if it's not the correct word. I updated it again. $\endgroup$
    – Miguel
    Commented Feb 14, 2023 at 18:14
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    $\begingroup$ Have you already tried the Trim brush? I think this is what you are looking for. It works internally like a boolean operation. You can click and hold the Box Trim brush to choose it or the Lasso Trim brush. For complex meshes the operation can take a while. The created colored areas are Face Sets (just if you wonder). $\endgroup$
    – Blunder
    Commented Feb 14, 2023 at 23:23

1 Answer 1

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The (Slow) Delete Brush

In the Sculpt mode you can delete geometry with the Box Trim or Lasso Trim brush. Click and hold the brush icon in the toolbar to select one of them.

The Trim brush performs a Boolean operation. Unfortunately this can be very slow for high-poly meshes. A similiar brush is the Line Project that removes the geometry on one side of the brush.

trim brushes

A Faster Alternative

For your mesh (250k vertices, 500k faces) these brushes are very slow. A faster approach would be the Edit mode. (1) Activate the X-ray mode (Alt+Z) and then (2) use the Select Lasso to select part of the mesh and delete the selected vertices (X). This is much faster.

edit mode

Other helpful selection tools are Selected Linked (hover mouse or select one vert and press L) and invert the selection (Ctrl+I) to remove other loose mesh parts. The Select Circle tool (C and Enter to confirm the selection) might be also an option to select a part of the mesh.

selection tools

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