I was actually just about to start this same exact project haha… so you have it built with multiple meshes in a third party software and are trying to import into unreal? In that case you can simply select the features you want exported and select export selection within the modeling software and export as fbx. Then simply import the fbx within unreal and everything should be there… but the mesh won’t have proper collisions unless you create them yourself in which case the mesh exported will need to all be one combined mesh… I use maya for my modeling and can help you directly if you use that as well, otherwise this is the pipeline I use . Let me know if you need help or if that even answered the question haha.