How to create a deformation of the earth as in the video?
This game uses the havok engine.
There’s a way to use scene capture actor and input world offset values to ground material.
The truth is that you need to code to get best performance and usability.
In SpinTires you accumulate dirt and you go through couple of ground materials with their respective physical properties. I would bet that their ground is split into patches and there’s some low level vertex arrays keeping all the variables defining the ground.
Ah, maybe you can go without code if you use runtime mesh component in Blueprints 