This is a study of two images: Leonardo Da Vinci's Annunciation and the Virgin of Guadalupe.

Many of my drawings I'll start using pencils and Mars Rapidograph pens.
After making a "coloring book" drawing, I scan it.
This outline is easy to make an image from in Adobe Photoshop using Paintbucket, Paintbrush, Rubber Stamp, Magic Wand and other tools.
Most of my art is made with conventional and computer drawing tools.