I have used OpenSCAD for a while. I should write a more thoughtful critique but ... dang, it is often hard to know which approach will just dramatically consum

I have used OpenSCAD for a while. I should write a more thoughtful critique but ... dang, it is often hard to know which approach will just dramatically consume days of CPU time and which will not. I suppose one gets a feel for it eventually. Modeling objects in my head parametrically is a snap. The language is a bit clunky and counter-intuitive but I have gotten used to it. I do not mind its imperative nature; adding and subtracting material is imperative at its heart. Still, it makes more abstract reference points more difficult. I found myself resorting to hacks like moving one object .001 into another object just to make sure they would meld smoothly. The underlying library, last I checked, did not support multi-threading so the aforementioned CPU consumption is especially painful. Exporting to giant .STL files is a little annoying. Sometimes the .STL files are "broken" according to Shapeways, so that is also bothersome.