This is a lithophane created using OpenSCAD of my motorcycle's dashboard (2009 Suzuki GZ-250)

This isn't customizable via customizer, to get it to work on your computer download images.scad & point the path to one of the images (or your own).

FAQ:
Q: Is bike3.stl really 170mb?
Yes, a 800x600 image produces a lot of polygons.
If you print this STL it may take a couple of minutes to slice but printing will only take a couple of hours. You may want to use a finer setting to get all the details.

Q: How did you create the images?
I used gimp and the posterize effect. I also made them black & white as well as using the Gaussian blur and de-noise filters.

Q: I noticed if I add anything to the OpenSCAD file it takes a while to render, do you see the same thing?
Yes, I noticed this too. Adding just the image doesn't take very long to render in OpenSCAD but trying to add a backing plate makes it super slow.

On the off chance you are editing the file to get a backing plate, you could use a raft without an outline to prevent part of the speedometer from being cut off.