Did this one early this morning . Around 8 am. Dug out the old tracing pad and prisma pencil.
The hard surface of the tracing paper takes the prisma well. I planned on posting this 15 minute pencil sketch but after scanning it , adjusting the levels and such I couldn't help adding color. Damn Photoshop. It's so easy to paint in photoshop. I just keep playing. No mixing color . No waiting for paint to dry and no paper buckling . I couldn't paint on tracing paper anyway. Maybe with markers but then the pencil would smear. It's hard for me to get back to "Old School".
Anyway , these are all meant to be quick sketch book stuff.