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Content Creation for Second Life and OpenSim

Can content such as meshes, and animations, be created in UE4 for use in Second Life, and OpenSim, grids?
https://secondlife.com/
http://opensimulator.org/wiki/Main_Page

UE4 is a game engine so it would be quite odd tom make something in one engine to import into another. I think you are looking for 3D modelling programs such as 3DS Max, Maya, Blender, etc for making meshes, animations, etc.