The Dimensions of Colour - A guide to the dimensions used to describe color and light, intended for painters using either traditional or digital mediums.
Handprint: Watercolors - Comprehensive guide to watercolor painting includes reviews of brushes, papers, books, and paints. Includes techniques and color theory.
The Painting Guide - Painting techniques compiled by Debra Clem, fine arts professor, Indiana University Southeast.
Painting Tips - Demonstration of the stages of painting development and questions answered on foreground detail and Plein air painting. Provided by landscape artist Wm. Scott Jennings.