Beautiful! If you are interested in making custom designs for a process like this (or even for the regular PCB processes) then you might want to check out SVG2Shenzhen which lets you export from Inkscape to KiCad on all PCB layers.
You can also get good results by dithering images and using the default bitmap importer packaged with KiCad! I posted a link to some images below, been using the technique for a while now. Not as sexy as full colour but it works with damn near all fabs.