This is done in acrylic. I originally had different intentions for this painting. I was going to do a windmill, but I was so happy with the mountain I didn't want to take the chance!! I will try Bob's windmill painting instead! Happy Accident!! These are liquitex paints on a 16 X 20 canvas. I'm getting a little more accustomed to acrylic painting. Can't wait to get back to oils though!