Comment: I believe they use .stl files to print from

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I believe they use .stl files to print from

a .stl file is for stereolithography. any 3D modeling program will be able to output a .stl file from the model. I model in Pro/E for many years. To me it is the easiest and best 3D program. But I only have seen UniGraphics NX as a comparison.

How much does one of these machines cost?