SFT map visualiser allows to use gradients from fractal extreme. I rendered this with kalles fraktaler because mandel machine didn't solve glitches yet.
I rendered in 16000×9000. You once sent me a version of the map visualiser that handles that resolution. Later versions didn't anymore. It saves as JPEG, but I applied 4×4 anti-aliasing in photoshop and then saved as PNG, so the quality loss from the JPEG compression is minimal.