Whenever I use Twinmotion, I create a ground plane and paint vegetation on it. Everything looks perfect—I save the model and exit. When I reopen Twinmotion the next day, the ground plan will have dropped by about 1–2 feet, separating from the vegetation. Since the vegetation is linked to the topography, raising the topography back to its original height also raises all the vegetation with it. This has now happened with four different models - separate data smith login and different Revit file. this is extremely detrimental to all of the models and has been an incredibly large issue.
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