Hi Regaltwo You're welcome! Yes - in that example above - the terrain (+Eco) starts underwater (pre-populated), rises up, then tilts around the camera ending at that angle. I didn't have anything else on the terrain except the Eco, however I didn' attempt to Edit the Eco after the starting timeframe where I first populated. The only thing I can suggest is to perhaps try a very simple example such as this to see if you can reproduce the problem, let us and Tech Support know the steps if you run into it. If not - then try resetting the EcoSystem back at the initial Frame, populate underwater as I did but making sure that you select any other planes (like ground and water) and check the "Ignore for Ecos" option on them. Good luck!