Are you looking to create a clean and simple 3D view in Revit? One way to achieve this is by making the 3D view monochrome. Here's how to do it:

1. Open your Revit project and navigate to the 3D view that you want to make monochrome.

2. Once in the 3D view, go to the 'Visual Style' panel in the toolbar.

3. Click on the 'Graphic Display Options' button to open the 'Graphic Display Options' dialog box.

4. In the 'Graphic Display Options' dialog box, you can choose the 'Monochrome' option from the 'Display Model' drop-down menu.

5. After selecting 'Monochrome', you can further customize the appearance by adjusting the color for the lines and patterns in the view.

6. Click 'OK' to apply the monochrome effect to the 3D view.

By following these steps, you can create a monochrome 3D view in Revit that brings focus to the forms and shapes of your design without any distracting colors. This can be especially useful for presenting a clean and simple rendering of your architectural or interior design project. Give it a try and see how it can enhance the visual impact of your Revit models.