> That brings me to a question --- is there a way in code to determine > if one is running OpenSCAD as opposed to a clone?  Wouldn't that depend on how good the clone is?  Just like a virtual-machine environment, a really good one would be indistinguishable from the real thing. And why do you think it's a clone?  Based on the examples, it looks like it's compiling the graph into an OpenSCAD program and then running that program in a more or less real OpenSCAD.