Soft Selection
This page documents the Soft Selection for hair tools in Cinema 4D. It weights the effect of grooming tools by distance, shown as a color gradient in the viewport — so brush strokes blend smoothly into the surrounding hairstyle instead of ending abruptly.
Soft selection can be applied to all Hair selection tools, i.e., elements that lie outside a given tool's radius will not be affected as strongly. The effect of a given tool will abate more, the further away an element is located from the tool. The weighted selections are shown in color in the editor view: Blue = not selected; red = selected.
The Soft Selection settings can be found in the Soft Selection Manager dialog window that opens when you select Soft Selection Manager from the main Hair menu.