[huxingyi]

Dust3D use right-handed coordinate space, X - front view, Z - side view, Y - up. I am not quite sure what exactly coordinate space other software use, but I make sure the exported fbx looks as the same in Unity, and the exported glb looks as the same in Godot.

[starbeast]

If the fbx loads into Unity fine, are you not using a left handed system, or are you flipping it on export?

edit - I'm an idiot, Unity does its own conversion to left handed on import.