I would like to have a 3d modelling program built into UE4. That way we could make new meshes without having to mess around with other 3d modelling programs and importing them into the game.
While I don’t think a full fledged 3d modeling app would be appropriate for UE4, I do think some basic functionality, with the ability to extend through plugins, would be a very nice thing.
There is some basic functionality, and at some point they were looking to improve it though I think that’s been put on the backburner. But in any case, you would benefit much more from using a separate 3D modeling software which has had years of development for that purpose and is far better suited for it.