Rotate Family in Multiple Axes: Nesting Face Based

[paul_anstey]

Hey everyone,

I’m trying to build a family that can rotate on multiple axes, but I’m running into an issue where the geometry’s orientation changes once I nest the family for the second rotation, so that it's facing a different direction.

I’m following the method shown in this great video: Revit MEP - Rotating family - Option 1 

Here’s how my setup is structured (from the innermost nested family to the outer host):

1. Geometry – Face-based family containing the actual model.

2. Rotation in Ref. Level – Face-based family using Reference Lines to control rotation from the top-down view.

3. Rotation in Left Elevation – Another face-based family using Reference Lines to control rotation from the side view.

The problem: when I nest the second rotation (the Left Elevation version) and host the geometry to the new Reference Lines, the original rotation gets lost. The geometry’s base orientation shifts, and I can’t get it to line up properly again.

Has anyone managed to get stable multi-axis rotation using nested Reference Line setups like this?

Thanks in advance!

[paul_anstey · Accepted solution]

I figured it out, using a much simpler method: https://www.youtube.com/watch?v=ELzBAY6fbC0

I had to pre-rotate my original geometry before nesting, to get the correct orientation.  Then I could nest again using the same rotation method to rotate on Z axis.