What lies behind UE's Pivot Painter 2?

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Twitter:   / ghislaingir  

It was hard to make sense and explain all the shenanigan the script relies on, so I did my best :D Hope you'll appreciate the video!

0:00 Intro
1:00 Baked data
2:36 Material functions
3:15 Hierarchy Reconstruction
4:20 Hierarchy Selection
6:50 Hierarchy Rotation
7:24 Rotation Function
8:25 Rotation Issue Fix
10:00 Bitshifting Algorithm
12:35 Outro

Blender Pivot Painter addon: https://github.com/Gvgeo/Pivot-Painte...
UE's documentation: https://docs.unrealengine.com/4.27/en...

Note 1: There's apparently a small difference in UE5.1 (and possibly 5.0.X as well, this doesn't happen pre 5.X afaik) somewhat 'breaking' Pivot Painter's default material found in the Content Examples project which disables the leaves rotation due to a division by 0 which was previously not causing an issue. See my twitter post here:   / 1600149067820019717  

Note 2: There's also a small typo in the original pivot painter function that prevents leaves inheriting from the level 3's rotation due to a small typo in a Switch Parameter. See my twitter post here:   / 1593301220621418501