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Hello! Thank you so much for your interest and for your comments! Yes! These should work in any 3D application that supports FBx files (including those you've suggested). In regards to Unity you would have to look for how the engine works with the Collision Meshes (usually it's just a matter of editing the naming or something similar). If you just want the assets to render, you can simply delete the collision meshes - in my case (UE4) I used their necessay naming convention, so the collisions are the objects that use the following naming: UCX_[nameOfTheObject].