This shadertoy script is running a ray matching algorithm with a series of affine transformation to generate fractals. To get an ‘infinite’ fractal plane I use transformations that leave the fractal with cubic symmetry, then using a modulus operation only the x and y coordinates I copy the fractal over an infinite grid. If transformations that generate the fractals are slowly modified over the x-y plane then it allows the surface to slowly change over the surface. This creates a changing fractal landscape to explore.