So I just tried this out, but on Windows. The directions were pretty good (I downloaded the 64-bit .exe file). I went to the archive3d.net website and downloaded a .3DS model, but Meshlab was unable to open that file type so I just make a quick .STL in SolidWorks. Then opened fine in Meshlab and the rest of the directions were fine, other than step 5. I couldn’t figure out what the ‘form window’ was. Turns out it’s the window that pops up when you choose the depthmap shader! Once that was figured out I was all set on making the depth map.
Remembering back, there was this post:
http://community.glowforge.com/t/3d-greyscale-engraving/1823/21?u=christopher
In SolidWorks, you can take these displacement/depth maps and use them as textures on your parts which I was able to do with this process! This was a great video that described the process. Not sure what I’d do from there with it though but thought it was ‘neat’!