Just just you do in the editor but via blueprint?.. I know it will be a lot more limiting, but if there is access to it that would be great .
Unfortunately it’s not possible with blueprints, but with C++
Here you can get some suggestions:
https://forums.unrealengine/showthread.php?4224-How-to-do-deformable-Terrain-meshes-textures
Thanks, looks very complicated though.