When you simulate, on Grabcad Print, the print time of a specific design and orientation of a part (using for example a Fortus 450), how can be possible that the system shows differente volumes (cucbical centimeter) of printed material/support when changing material?
Is that a bug? Volume should be always the same, at least what changes is the weight according to the spcific gravity of each material.

In the simulations I set the part with "solid" infill.