BackgroundWarper v. 1.0 (demo version) creates seamless geometrical background patterns yet unseen in Web pages. Instead of drawing the tiles yourself with brushes, you set parameters (of warpers, squishing and colours). In the Warping settings you set the tile size, the warpers and their parameters. In the Squishing settings are choices such as of 8 appearences (waves, droplets, toothpaste etc.) with some more parameters and in the Rendering settings you set the colours of the paper, the light sources and the shades, using hints to make them harmonize. Explications come in the Help menu.
BackgroundWarper (demo) comes with examples (ready to use). It has a limited number of warpers and some less explication with respect to the full version.
Requirements: Macintosh PPC, colour (as ifノ). The pixel depth of the tiles generated being that of the screen, at least 32000 colours are best.