Sorry about that. This feature is interesting to me as well. We’ve seen some developers get in-game heightmap and material modification working with only minimal changes, but it requires linking with editor-specific code which is not currently allowed to be in a released game. From my understanding of how it is all setup, we’d need to do a fair amount of refactoring to get the core terrain spawning and editing features available in game at runtime. I’m hoping we’ll have time to work on this though! If you guys end up digging in and getting this working, we might be able to collaborate!
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