The Book of Inkscape

21.4 Sketching and Coloring

Enough boxes; it is time to put away the 3D Box tool, arm yourself with the Calligraphic pen, and start sketching on top the 3D blueprint. Create a new layer so you can show and hide the 3D boxes and the actual drawing separately.

Of course you don’t need to trace the edges of the boxes precisely. For nongeometric objects, such as the sofa and the humans, this is hardly possible, but even the walls and windows will benefit from some hand-drawn roughness and imperfections. Use the edges of the 3D boxes as general guides to keep an eye on, but otherwise draw as freely as you would draw without any guides at all, using your own manner and style of sketching. You also don’t need to trace all of the lines; some can be omitted, ...