Why lines fade out in Revit

[Anonymous]

Hello I'm new to Revit again, used it own in a copy in 2004.

For some reason the exterior and interior lines will fade out when I zoom or move directions.

I can click the walls and the lines will lighten up. 

Your help is greatly appreciated.

[RDAOU]

@Anonymous 

Looks like you are having a graphics issue...try the following

1. Go to File menu >> Options >>> Hardware >>> uncheck "Use Hardware Acceleration"

[barthbradley]

Some Objects disappear while working on the model in Revit | Revit | Autodesk Knowledge Network