Here are some ideas:
- Use a Filter with a Drafting Pattern and match the Hatch Scale to the View Scale. Link: Model pattern not visible on ramps in plan views?
- Use Floors with slope arrows instead (to simulate a Ramp)
- Make a 4 point Adaptive Component that has a surface with a slight vertical offset, and place it on "top" of the Ramp surface. Apply your Model Pattern to this "skin".
- Orient a 3D view to Plan, Lock it and annotate (instead of using a Floor Plan)