Mach1 Filter.exe.
Mach1 Filter is a little known and often overlooked, free, stand-alone, Windows based application which can be used to create the necessary GCode tool-path for producing Lithophanes, 3D Relief’s and also laser, raster scan images etc.
It was written a few years ago and is pretty basic (without all the bells and whistles often found in more up-to-date software) but it still does a good job, and can accept HPGL, JPG & BMP format images.
As with most...
Producing 3D relief's for free.