- Render a scene
- When the missing material dialog pops up, start SysExporter
- Find the dialog in the list (you can use the target to drag and drop onto the Rendering dialog)
- Once you find the list of names, you can copy / paste them, or export to a file
- Find the missing materials and point your Revit install at them using the Render Appearance Paths in Revit Options.
You can get it here.