Yesterday I tried to add forces to my ship, which has a Mesh actor. It didn't move because of the PhysX limitation, as I read later in the manual.
Well, my question is: Is this really a limitation of PhysX or of the engine? I'm asking because a couple of years ago I was playing with the Ogre engine using NxOgre, a physics wrapper for PhysX. And there I was able to use mesh actors as dynamic actors. Now I'm confused because the both engines use PhysX but have different limitations :?

This is a 100% PhysX limitation.
It doesn't allow for mesh based actors.

You should simulate the mesh via Phys body created out of multiple geometrical shapes in Mesh Editor.

Ah, ok. I think this NxOgre wrapper calculates physics for mesh actors on his own and not the PhysX itself.
I'm trying to create a phys body in Mesh Editor right now.

Thanx, Esenthel.

I've added an option to automatically build the Phys Body as convex mesh in the Mesh Editor (will be available in the next release)

Good to hear that, Esenthel!
One question: what is the difference between convex type and mesh type actors?

Another question: How can I rotate a physics shape in Mesh Editor? I tried every key combination, but nothing works.

convex actors can be dynamic, while mesh can be only static.

hovewer convex due to their nature will look like this:

to rotate please select 'rotating' mode (key 'e')
then with a shape selected use the right mouse button

Thanx for the explanation.
The right mouse doesn't work. I can move and scale a shape but not rotate.
And CTRL+RMB doesn't work either (for scale in one axis). I can scale only in all three axis. Hmm...

I've tested it and it works fine.
what type of shape are you using?

Oh, it doesn't work only with the ball shape..
Wait, is it possible to squeeze a ball shape, scaling it only in X axis?

Ball cannot be squeezed