“The rays, to speak properly, are not colored; in them there is nothing else than a certain power and disposition to stir up a sensation of this or that color.”
This text tries to teach the art of digitally alter and conjure images to your own liking. It attempts doing so from a programming mind set instead of a mathematical one. Becoming intimate with a colored sampling grid is the ultimate goal of it.
The text concentrates on the aspects used by filters, but the skills presented are also applicable to computer graphics and ray tracing. OpenGL and hardware acceleration have removed some of the center stage in the world of computer graphics, the revenge over the origamic geometries will come from a more sampling oriented world, with surfels; voxels reborn.