Yup! As an update, I disabled the rear-orientation culling setting on the mesh in Godot and it was immediately fixed.
This is exactly the tool I have been looking for! One question: when importing the .obj file into Godot, the mesh looks like it's inverted or something. All faces facing the camera are invisible (...is the best way I know how to describe it)
Oops. Thanks!
Great asset. Would be great to include some small guide on which frame sequences are for which animation. It's hard to tell exactly from the PNG alone