HKX Skeleton Exports Incorrectly

[shinyparrot807]

I made a custom Skeleton.hkx based on the Sabrecat for a new creature. I omitted any unused (for the new creature) bones in the hierarchy and the preview in Blender 4.4.0 is seen here. I'm using the latest PyNifly as of Feb 22nd 2026 - 23.1

And when exported to either an actual hkx or xml, the preivew in Havok Content tools' Havok Preview Tool looks drastically different. The parenting seems correct but I'm afraid the other transforms do not line up.

Here's the blend file, .hkx and .xml outputs

https://mega.nz/folder/JrR0QQ6a#syYTCP00WdoUZICz52NoSw

[BadDogSkyrim]

Try with the latest. I found and fixed bugs and I think the round trip works now.

BUT I'm kinda hesitant to say this is useful yet... there's a lot of junk in a havok skeleton file besides bones, and I have no idea how to represent them usefully in blender.