The algorithm I wrote is inspired by the one used to produce Brownian clouds. The idea is to draw a pattern, and then sum it at smaller and smaller scales. This gives the image structure on a wide scale range while preserving some kind of homogeneity, as the patterns you will see with your magnifying glass will be roughly the same as the ones you see from far. Each image is a whole little world that is rather difficult to imagine from the low resolution pictures displayed here.

The possibility to use classes in algorithms introduced recently with Ultra Fractal 5 allowed to substantially increase the diversity of patterns this algorithm can create.