scumbling

A scene painting technique similar to a wet-blend.

From Painting Lesson: Scumbling

Scumbling is painting thin layers of opaque light colour over dark colours, which gives a broken colour effect. Scumbling is rather like glazing, but with light colours over dark. The colours mix optically rather than on the palette, and the result is shimmery, opalescent. Think of the pearly water surrounding Monet's water lilies.

Click to expand...

According to Susan Crabtree's book Scenic Art for the Theatre, "In scenic art, the term scumble typically means covering a surface by laying two or more colors next to one another using paint strokes in X-like patterns."