I wrote a plugin to integrate Pcbnew with Inkscape. Seamlessly. Back and forth, to leverage the advantages of both.
This was written to address some frustrations with other “artistic” PCB workflows. KiCad and other traditional ECAD software has poor support for curved lines, importing and processing of images/drawings, and many other features that can be expected in proper vector software.
Tools intended to bridge the gap are also lacking. PCBmodE is the probably the best tool out there from a pure PCB art standpoint, but there is no schematic tool, and with that, no ability to handle extremely complex, functional PCBs.
KiCad has a tool to export to SVG. SVG-To-Shenzen is a tool to convert SVG files into KiCad files. Both of these are single-direction tools.
Stretch goes both ways. Much as the ideal schematic->PCB capture workflow does not exist, the PCB layout aspect must go hand-in-hand with the art aspect.
Users can start by laying out a PCB, then bring it into Inkscape to arrange a thousand LEDs into a flower arrangement, then bring it back into KiCad to lay out traces, back into Inkscape to curve the traces, back into KiCad to change their microcontroller and few pin assignments, back into Inkscape to draw out some silkscreem patterns, back into KiCad to run DRC, and so on. The workflow is intended to be seamless and painless to go back and forth.
Give it a shot, submit issues / PRs, and do cool stuff with it. The world is your oyster.