Skin Tools UI - Paint tab

The Paint tab provides tools for interactively painting skin weights on the active layer.

Painting operates on the selected influence and uses brush settings to control how weights are applied.

Brush behavior

Brush projection	Determines how brush strokes are projected onto the mesh and which vertices are affected. Surface: Projects the brush onto the visible surface under the cursor. Volume: Affects vertices within a 3D radius based on distance from the brush. Screen: Projects the brush in screen space, affecting vertices on both front and back of the mesh.
Brush mode	Defines how the brush modifies existing skin weights. Replace:Sets weights directly to the brush value. Add:Increases existing weights by the brush value. Scale:Multiplies existing weights while preserving their relative distribution. Smooth:Averages weights with neighboring vertices to reduce abrupt transitions. Sharpen:Increases contrast between weights to tighten influence boundaries.
Brush shape	Controls the falloff shape of the brush.
Intensity	Controls the strength of the brush effect.
Brush radius	Controls the size of the brush.
Brush iterations	Specifies how many times the brush operation is applied per stroke.
Influences limit	Limits the maximum number of influences per vertex during painting.
Weight bleeding	Limits painting to existing vertex influences.
Isolation	Restricts painting to the current component selection.
	Interactive mirror: Mirrors brush strokes across the symmetry axis.
	Sample current joint on stroke start: Updates the active influence when beginning a stroke.
Removed weight	Distribute to other influences: Redistributes removed weight to the remaining influences on each vertex to maintain normalization.
Stylus pressure	Specifies how stylus input affects brush behavior during painting. Unused: Disables stylus pressure. Brush behavior remains constant. Multiply intensity: Multiplies brush intensity based on stylus pressure. Multiply opacity: Multiplies the brush opacity on weights based on stylus pressure. Multiply radius: Adjusts the brush radius based on stylus pressure.

Display settings

Controls how skin weights and layer data are displayed in the viewport while painting.

Influences display	Specifies how the active influence is displayed in the viewport. All influences, multiple colors: Displays all influences using distinct colors. Current influence, grayscale: Displays the active influence using a grayscale gradient. Current influence, colored: Displays the active influence using color.
Mask display	Specifies how layer masks are displayed. Default: Displays the mask using the default visualization. Color ramp: Displays the mask using a color gradient.
Show layer effects	Displays the result of active layer effects.
Show masked weights	Displays masked weight values in the viewport.
Hide unselected vertices	Hides vertices that are not part of the current selection.
Show Original Mesh	Toggle between displaying the original mesh and the painted mesh showing weight values.
Wireframe color	Specifies the wireframe color used in the viewport display.