Here's a traditional art sketch card, produced on a 4 X 5 inch blank licensed card. The cut lines are set at 2.5 X 2.3 standard trading card size. Artwork is Copic marker and Prismacolor colored pencil. This card was created as a random insert for the 2018 Rittenhouse Archives Star Trek Captains collection Card series. See more at Sketchcardsandcovers.com
One thing I love about natural objects is how they often remind me of handmade objects. Like these acorns--the caps look just knit caps. So I scanned in a handful and used them as the basis for this sketch.
I started with watercolor and watercolor, but then realised I needed a more opaque black and switched to gouache, acrylic and brush pens for the final touches. Most of the original looseness was lost after that, however he looks more accurate now I think.