Global Distance Field settings are in cvars from console, and there’s one in World settings for the distance it covers from the camera (default 20,000). This sounds as if there’s a different problem than simply the settings for the trees. Are you able to share the project file? I’m open to looking at it on my computer, but I need the trees’ file too if it’s not in the Content folder of the project. If it renders ok on my computer, it could be a hardware or software bug on yours. If it renders the same as yours, then I’ll look at various settings quicker than suggesting them in the AnswerHub.