Hi Vata,
Sorry about this! I missed your comment and only just now saw it.
I believe I understand what you are asking, but I’m not sure which process you are talking about using to make the grass? Some sort of procedural system for it you mean? Currently all of the grass is being painted onto the terrain with the foliage tools that Unreal provides. The only way I can really imagine having pieces of grass move individually is by having each strand as its own separate model which would get expensive very quickly. Perhaps you could expand on your idea a bit more? Or your specific frustrations. Thanks!