Landscape feature needed


I don’t think this feature is in the most recent version of the UE4, and it would be very useful to have it : I would like to be able to edit my landscape at runtime with decals/heightmaps to create craters.

And it would also be great to have a 2nd texture for the landscape to tell the game which part of it can be modified to avoid having a crater under a building (for example). I can do this specific stuff myself, but I’ve no idea about how to create holes/craters at runtime without modifying the engine…
The only thing I found on internet was an outdated plugin.