I’ve encountered a recurring issue in Revit 2025 regarding how Toposolid materials are handled when applying subdivisions. The problem arises when a Toposolid is assigned a grass material, and a subdivision surface with asphalt is added on top. The grass material from the original Toposolid remains underneath the asphalt, which becomes problematic when exporting the model to Lumion. Since we use 3D grass material in Lumion renderings, the grass ends up protruding through the asphalt, disrupting the visual fidelity.
Suggested Improvement:
It would be incredibly helpful if Revit included a feature or setting that allows users to automatically remove or suppress the material surface of a Toposolid under subdivisions. This would ensure that, in cases like this, the grass does not interfere with the asphalt or other subdivision surfaces, especially when exporting to rendering software.
Such functionality would greatly enhance workflow efficiency and prevent the need for manual workarounds to address material conflicts.
