This issue is a device killer for me. The SpaceMouse hardware is amazing, but the software implementation is a horror show. There are TWO problems with rotation for me.
1. The SpaceMouse driver ignores Constrained Orbit in the Fusion360 settings.
2. The SpaceMouse driver has a rotation transform bug. The bug can be exposed by turning OFF all axes except 'Dial Rotate' like turning the SpaceMouse like a volume knob. Then set the viewing angle using the ViewCube in Fusion360 to a shallow angle (not 45 degrees), and then using the spacemouse to rotate the camera around the Origin vertical axis. Yes the camera rotates about the vertical axis, BUT the camera also tilts left or right. (like tilting your head sideways). This bug in itself drives me nuts, making the user FIGHT to keep the camera upright all the time! Interestingly the orbit about vertical axis works perfectly if you click HOME VIEW then rotate. So the transform bug doesn't happen of the camera is looking down at the object exactly 45 degrees from horizontal.
These issues are so bad I actually return to Shift-MiddleMouse Drag in frustration.
The final insult is, 'LOCK HORIZON' is an option when using the 3DConnexion Demo software! Can you believe that?
Having just bought the SpaceMouse I am horrified this has not been fixed for several years, and am genuinely worried I've wasted my money.
Thanks for the VOTE page!