It looks like the Ground Plane is locked to the XY plane in Inventor. Is that true? I would have expected it to follow the same ground plane as Inventors on the Inventor View Tab.
Scott Moyse
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Design & Manufacturing Technical Services Manager at Cadpro New Zealand
Co-founder of the Grumpy Sloth full aluminium billet mechanical keyboard project
The ground plane is purely a visual element that does not effect the results. Currently, the ground plane cannot be moved to a different surface. To my knowledge this visual ground plane is going to be the surface of the wind tunnel that is parallel to the XY plane.
Also, you would have to eyeball the placement of the 'ground' surface of the wind tunnel.