Post Process Animation - Skeletal Mesh Crumpled


I set up an AnimationBlueprint on a UE4 Mannequin and have succeeded in rotating the Pelvis bone through code in a custom AnimInstance. I also set the same AnimationBlueprint as my Post Process Anim Blueprint.

But my problem is that the skeletal mesh is crumpled in a pile of unrecognizable mush.

Skeletal Mush

Here is my AnimGraph.

Anim Graph

I wasn’t sure what the initial node should be for the AnimGraph so I used a skeletal mesh reference.

Thanks in advance.

EDIT: Using the Mesh Space Ref Pose as the initial node fixed it.