Ok, I discovered this because it is a crocheted Discworld ;-), but I find the idea to crochet a disc, to scan it, to colour it at the computer screen and then to crochet the definite disk following this pattern interesting :)
If you’re more interested in baking something, take also a look at the Discworld cake ;-)
Links:
Coloured Pattern on a Crochet Disk (Discworld update)
English Wikipedia entry for ‘Discworld’
German Wikipedia entry for ‘Scheibenwelt’
Here at unikatissima:
Discworld Cake