You can only rotate the 3d shape by the z axis. Another option is buying the third party 3dobject which lets you rotate any way you like.
The third option it to use distort meshes to make the 3d object, then you can rotate it any way you like with various amounts of math. Here are all the examples I've made to date. Some are much simpler than others.
If you like math here is the gist of what's going on with vector math:
rotatedVector = (positionVector-centerVector)*orientationMatrix3x3+centerVector
Rectangles
https://www.dropbox.com/s/9uko7hxjyp9z1uu/xyRotate.c3p?dl=1
https://www.dropbox.com/s/6qs81zmktsd3so8/yaxis_rotate.c3p?dl=1
Cubes
https://www.dropbox.com/s/unnqd7exmaca6lk/mesh_cube.c3p?dl=1
https://www.dropbox.com/s/5n5umhdkfhr0qhg/cube_roll.c3p?dl=1
https://www.dropbox.com/s/zis7zp6rggxpdny/dice.c3p?dl=1
https://www.dropbox.com/s/hvrhxk4bsslm8f3/3d_dice_v2.c3p?dl=1
Spheres
https://www.dropbox.com/s/lucl1153bmmr3qo/mesh_sphere.c3p?dl=1
https://www.dropbox.com/s/2l2dtel4t0zf9jw/mesh_sphere_roll.c3p?dl=1
https://www.dropbox.com/s/rkomtba52rlqw3t/mesh_sphere_roll_terrain.c3p?dl=1
Model
https://www.dropbox.com/s/uy6yfhpag7d1t2p/obj_loader_and_raycast.c3p?dl=1
Amazing! Thank you very much :)