Are Perimeter 3D and Crosshatch 3D Useful for Orthos?

I’m looking to make 2D orthmosaic maps only (with no 3D) and heard that having these settings checked will increase the detail/accuracy of an orthmosaic. If so, how are these settings useful for orthos? Thank you in advanced

If you run a proper nadir flight oblique images will not make an ortho better unless you have objects that are oddly shaped. As a matter of fact nadir images will clean up rooftop edges and in between verticals that obliques cannot capture so in my opinion for the best 3D model you should do all 3 flight types. For just a good ortho nadir is usually fine. Perimeter is a waste on large sites.