Type "Toposolid errors" into the F1 help pane. Fix: Revit 2025 replaced legacy Toposurfaces with Toposolids. The help page explains that overlapping Toposolids cause rendering failures. You need to use the new "Merge Toposolids" tool, which is found under the Massing & Site tab.
Most users ignore the F1 key because they assume it just opens a massive encyclopedia. In Revit 2025, Autodesk has overhauled this experience. autodesk revit 2025 help
has improved its indexing for "Community Ideas". For the first time, features requested by users (marked with a lightbulb 💡 icon) are clearly documented, making it easier to find solutions to long-standing workflow pain points like wall join controls Visual-First Guides : Given the complexity of the new Navigating Complexity: Why "Autodesk Revit 2025 Help" is
 | | | | | |