I was trying out the TriCurveFill-Brush, creating some petals with radial symmetry. However trying to create a second set of petals/curves, the old ones get deleted. They do not get masked off automatically like the tutorial video says (ZClassroom - 3D Brushes - TriCurveFill), neither are they saved, when I masked them off manually before trying to create the new ones.
Any ideas?