This page lists some tools and methodologies created personally to enhance workflow or to increase knowledge in certain areas. Some are not tools but rather articles about specific topics such as color or perspective. By setting up these rules which are a bit technical it makes it easier for me to create the artwork because there are rules to follow, not slavishly but at least to give directions.
A problem when painting a scene with different colored light sources is to get the color changes right. This article takes up a solution to the problem.
Getting a correct perspective is not just about putting out convergence points and perspective guidelines. The properties of the "camera" can be handeled by knowing how it is affected by the position of the convergence points.