MaskPaint

MaskPaint creates mask images directly with paint strokes, primitive shapes and polyline-style strokes. Unlike the regular Paint node it works on single-channel mask data rather than arbitrary RGB channels.

The node has a single optional Effect Mask input. An incoming mask can be combined with the painted result; the combination is controlled by Paint Mode on the Mask tab.

Stroke type matters. Multistrokes are efficient for repeated cleanup but are less editable after painting, while vector strokes are better when shape and timing need further adjustment.

Stroke Duration can make cleanup exist on one frame, a range or the whole shot. For Multistroke workflows, set the intended duration before painting and verify neighboring frames.