My last work. Is only a showcase to three features. For Delaunay there is pixel and pixel to vector based tools too much faster. But any of the tree features has power bu itself.
No width eraser mode now in trunk -devel version-
Random Color With Limit Range Extension is now in trunk.
Delaunay with fill color extension are in this bug: https://bugs.launchpad.net/inkscape/+bug/1553497
Thanks Tav for your checkboard background code.
Artista: Heavy, Huma-Huma