Apparently you still have not read the 'Forum rules':
Yes,I read them,onw by one,every single letter.
I just think that is quite annoyning post in an irrelevant topic now.
Of course,the topic is relevant to who search for it, but in this stage of development,I think it's pretty clear that interaction between particles it's not an plausible thing. Yet.
I think it's better opening a thread talking about voxels,and physical interaction,and then talking about terrain deformation.
Astroneer uses Voxels to make this possible,for example,but SE is a different story.
We could use,IDK,some procedural crater effects?