Blender Git Commit Log

Use curve twist for the CurveDeform modifier and bones (anything that uses curve_deform_verts() and curve_deform_vector()).
So means minimum twist and twist smoothing are now used.

the Z up quaternion from the path is rotated to match the up axis given.

There was no logical rule for the up vector, some cases flipped the normals when used with the CurveDeform modifier.
Use the default X-Up behavior and match other settings with this. (comments explain this in detail).



- Interpolating quaternions didn't work in some cases, disabled for now.
- 'no_rot_axis' is different from in 2.4x since it now removes rotation from the tilt whereas before it edited the axis before calculating the tilt.