[MENTION=5535]Oskar Świerad[/MENTION]: Hey! Thanks for the explanation video, really helped understand how all of that works. Now I have one question: in the foliage tool you can randomize the scale of trees for example but you say in the video that you should not change the scale and leave it at 1.0 since it can cause some issues. Is it no longer instanced once you change the scale value ? Why does it work in the foliage tool ?
Now I’m currently trying to create an environment system using my own trees which can grow and change state (dry, wet, burned etc.) at runtime. How would be the best approach on doing this ? I thought about a blueprint which spawns HISMs , create the variables for the “age” of each instance and let them increase by a timer (simulating the growth at runtime). But I guess this would also “break” instancing ? Do I need to have different static meshes for the different “ages” of the trees ? Can I even change the material to be “wet” on a group of instances ? I’m a bit lost here 
Thanks in advance!
Update I removed and added instances at runtime (made them bigger) . This seems to work as long as I don’t remove/add too many instances at once (to avoid lag spikes)