Building the Background

Sketch Effect in Corel Painter

With the Clone Color Stamp disabled, brush in your initial wash with Phthalo Blue, Cobalt Green and for the darker tonal areas Cobalt Turquoise. These colors are all available to you on the Default Color Palette. Your Layer hierarchy should be Canvas, Layer 2, Layer 1. Close the "Eye" icon on the Sketch layer and depend more on your own creativity, building detail and color.