Fractals/mandelbrots, not much difference i think...
Anyway, its from a prepped image. I had to trim and scale and pixel resize the original and edit the pallette to 16 colours. Then change the colours in the image to match whats available in the game. I have the image open on one screen and blockland open on the other. Nothing hard about it really, it just takes time to get right.
Relaunching server now if anyone wants a peek closer up.