There seems to be C++ code for the landscape to update/flush/etc the grass. I’d suggest popping the landscape into blueprints and see if there’s anything you can use to reset the grass there, then sync it with when you change the material instance.
There seems to be C++ code for the landscape to update/flush/etc the grass. I’d suggest popping the landscape into blueprints and see if there’s anything you can use to reset the grass there, then sync it with when you change the material instance.