I have animated a model and it looks fine through blender. However, it acts as if the entire animation is rotated upside down and inverted when exported. This is not a export-import issue as this happens with every exporter. I have checked the rotations of all the bones and the object and they seem fine to me. I fiddled withe rotations and added rotation keyframes to see if that would fix it but it didn’t unfortunately. My .blend is attached.
Not sure what engine you are using but your Armature has a 180˚ rotation around the X Axis - in your case it is possible to fix this by using ctrl+a and apply rotation/scale. Do that and then try re-exporting/importing.
How much would I rotate it? If I rotate the armature, and make it 90° or 0°, it doesn’t fix this. If I rotate everything 90° or 180°, it also doesn’t get fixed. (Also, my model already had a regualr scalr, not negative. I know that makes things upside down. I did make it -1 anyways to make it upside down to see if it would export upside up, it didn’t fix it).
After filding with the rotation with all objects, I just applied the rotation to the armature only and it worked. Thanks for your help. Please lock this thread.