In a typical workflow, set the maximum value you want to achieve with the Value attribute, then adjust the Strength to decrease or increase the effect of the Paint Operation.
Hotkey: Pressing Ctrl toggles between Increase and Decrease.
Increases the density of hairs in the brush radius by the set Value.
Hotkey: Pressing Ctrl toggles between Add and Remove.
This option is not available when Paint Operation is set to Decrease.
To do this, in the Node Editor, connect the Output Spline Data port of the source descriptionShape node to the Interp Source port of the target's description_base node.
Improves the interpolation results when the Density and Place brushes generate new hairs. Higher values increase the amount of neighboring hairs that influence the shape of the new hairs. For the Density brush, Smoothness is available only when Paint Operation is set to Smooth.
Increase Smoothness if you see unwanted hair clumping or other unsatisfactory results with the newly added hairs.