.fbx – Add objecto to Mixamo model and export animation to fbx file

I’m trying to add a guitar to a mixamo model. Following tutorials on the internet I have had no problems adding the guitar and having it move properly within blender.

The problem is that when trying to export the model to fbx format.

The guitar does not appear, trying to apply the transformations when exporting it appears very small and out of position with respect to the main model, but never with animation.

If in Blender I try to apply all the transformations, the object is deformed, and if I apply them using deltas, I don’t get any improvement.

I have tried to bake the animation in different ways, but I can’t get it to export to fbx.

I think the problem is with the animation baking, but I’m not sure and I’m stuck at this point.

Could you tell me how to properly add an object to the Mixamo character so that I can export it as an fbx file with animation?

Thanks