Hi everyone! I’m currently learning rigging in Houdini 21 and I've run into a bit of a roadblock that LLMs haven't been able to solve effectively.

I have a character with a skeleton (joints are aligned and ready), and I'm moving into weight painting and setting up joint limits. My issue is that I can't seem to find a straightforward way to enforce rotation limits within the Rig Pose node in KineFX.

I’ve tried the workaround suggested by AI: using two Attribute Wrangles (one before Rig Pose to define attributes like rot_min/rot_max, and one after to clamp the values). However, it’s not working as expected. While my display flag is on the Bone Deform node, I use Rig Pose to test the deformations, but the joints rotate freely (360 degrees) ignoring any constraints I try to set up.

I find it hard to believe that such a powerful package doesn't have a native way to enforce joint limits during the posing process.

My specific questions:

Is there a built-in way to define and enforce rotation limits so they are visible and active directly within the Rig Pose viewer state?

How do I make the Rig Pose node "aware" of these limits so it stops rotating at a specific angle (e.g., -30 to 30 degrees on the X-axis)?

Is the "Wrangle-sandwich" method still the standard, or is there a newer KineFX workflow for this in Houdini 21?

Any help or a pointer to the correct workflow would be greatly appreciated!

Why not just hit F to turn on enforce limits when using the Rig Pose?

I spent a month and a half only to confirm that Houdini is unfit for rigging. Not only is the Skeleton Mirror broken—forcing me to take detours just to mirror points and then completely dismantle and rebuild the hierarchy to get the bone orientations right—but the Rig Pose node is also a nightmare. It’s impossible to enforce rotation limits to see how the mesh actually deforms under constraints; it simply ignores every restriction, even if they are downstream in the node tree.

'A procedural giant,' they say? Why even bother offering rigging features if you can’t get the fundamentals right? If I had known, I would have jumped straight into Blender. I would’ve saved myself a month and a half of work, not to mention my passion for character animation.

For Edward: And what exactly is the 'F' key supposed to do for bone limits? It's useless.

Pretty late to this and for posterity, this is in the houdini docs for Rig Pose:

Enforce Transform Limits

When turned on, if your skeleton has any joints with defined rotation joint limits (as set up by the Configure Joints SOP node), then you will not be able to rotate those joints past their set limits when posing your skeleton with the Rig Pose handle in the Rig Pose viewport state. See Rotation limit handle viewport state visualizations for a demonstration of this behavior. You can also turn this option on/off per joint with the F hotkey.

You need 1 of the 2 nodes below before your rigpose:
configurejointlimits
configurejoints

Displayed in the viewport help, you can then hit F or shift + F to flip the limits

Example: