I need an abstract, unobtrusive background for a website, something similar to
Is there a tool that can procedurally generate such images with great variation?
It should have many parameters that can be adjusted or randomized, like base forms, size, variation, density, color properties, and so on.
It can be an online tool, desktop software, or plugin. It can be free or commercial.
Until now I only found tools that are limited to a very specific kind of image like BgGenerator.com
Also, "AI tools" like photoroom.com/backgrounds (that uses the "Stable Diffusion" algorithm) are not what I'm looking for: They modify and combine images that they obviously copy from the web, and the results are unpredictable: