Today one of our team members reported having framedrops when opening the Terrain editor panel in studio. Platform is Windows 10.
Here is a video showing the performance hit when opening the editor panel on an empty baseplate (no terrain):
https://gyazo.com/8d641afc7a3db95892437c98d540c62e
Let me know if there’s any other info that could help!
I don’t know if this is related to what your team member is experiencing however, I have EXTREME lag spikes and freezing while using the editor. Here is a post i made on the terrain editor update thread along with a gif of what I’m experiencing: Terrain Cylinders, Perfect Flatness, and a Fresh New Look - #86 by kinkocat
Platform is windows 10 as well and the same thing happens regardless of how much stuff is in workspace.
We’re currently looking into this.