Mask

Masking to control which areas of the mesh are influenced by sculpting.

Black part is masked.

Brush

To edit the mask, select the Mask Brush from the Brush panel.

Editing

Reference

Mode

Sculpt Mode

Menu

Mask

Masks can be edited across the entire model. Using A opens a pie menu to choose different operations.

Invert Mask

Reference

Mode

Sculpt Mode

Menu

Mask ‣ Invert Mask

Hotkey

Ctrl-I

Inverts an existing mask.

Fill Mask

Reference

Mode

Sculpt Mode

Menu

Mask ‣ Invert Mask

Fills the whole mask with a value of 1.

Clear Mask

Reference

Mode

Sculpt Mode

Menu

Mask ‣ Invert Mask

Hotkey

Alt-M

Fills the mask with a value of 0. To completely remove the mask data, see Clear Sculpt-Mask Data.

Box Mask

Reference

Mode

Sculpt Mode

Menu

Mask ‣ Box Mask

Hotkey

B

Works like the Box Select tool, it creates a rectangular mask region. Hold Shift to clear the mask of the selected region.

Lasso Mask

Reference

Mode

Sculpt Mode

Menu

Mask ‣ Lasso Mask

Hotkey

Shift-Ctrl-LMB

Can be used to create a free-form mask, similar to the Lasso Select tool.

ちなみに

To clear the mask of areas with the Lasso Mask tool, first invert the mask, apply the Lasso Mask, and then invert the mask back.

Mask Filters

Reference

Mode

Sculpt Mode

Menu

Mask ‣ Mask Filters

Mask filters are operations that are applied to the whole paint mask.

Type

Smooth/Sharpen Mask

Changes the crispness of the mask edge.

Grow/Shrink Mask

Changes the size of the mask.

Increase/Decrease Contrast

Changes the contrast of the mask.

Iterations

The number of times that the filter is going to be applied.

Auto Iteration Count

Use a automatic number of iterations based on the number of vertices of the sculpt.

Expand Mask by Topology

Reference

Mode

Sculpt Mode

Menu

Mask ‣ Expand Mask by Topology

Hotkey

Shift-A

Creates a mask radiating outwards from the active vertex in a uniform manner.

Expand Mask by Curvature

Reference

Mode

Sculpt Mode

Menu

Mask ‣ Expand Mask by Curvature

Hotkey

Shift-Alt-A

Creates a mask radiating outwards from the active vertex while following the curvature of the mesh.

Mask Extract

Reference

Mode

Sculpt Mode

Menu

Mask ‣ Mask Extract

Creates a duplicate mesh object based on masked geometry.

Threshold

Minimum mask value to consider the vertex valid to extract a face from the original mesh.

Add Boundary Loop

Creates and extra boundary loop on the edges of the geometry, making it ready for adding a Subdivision Surface modifier later.

Smooth Iterations

Smooth iterations applied to the extracted mesh.

Project to Sculpt

Project the extracted mesh on to the original sculpt object.

Extract as Solid

Adds a Solidify Modifier to the newly created mesh object.

Mask Slice

Reference

Mode

Sculpt Mode

Menu

Mask ‣ Mask Slice

Removes the masked vertices from the mesh.

Threshold

Minimum mask value to consider the vertex valid to extract a face from the original mesh.

Fill Holes

Fills concave holes with geometry that might have resulted from the Mask Slice operation.

Slice to New Object

Create a new object from the masked geometry.

Dirty Mask

Reference

Mode

Sculpt Mode

Menu

Mask ‣ Dirty Mask

Generates a mask based on the geometry cavity and pointiness.

Display Settings

Reference

Mode

Sculpt Mode

Popover

Viewport Overlays -- Sculpt ‣ Mask

The mask display can be toggled as a viewport overlay. In the overlay popover, the opacity of the mask overlay can be adjusted to make it more or less visible on the mesh.

Clear Sculpt-Mask Data

Reference

Mode

Object/Edit Mode

Menu

Properties ‣ Object Data ‣ Geometry Data ‣ Clear Sculpt-Mask Data

Completely frees the mask data layer from the mesh. While not a huge benefit, this can speed-up sculpting if the mask is no longer being used.