Rhino viewports within Rhino.inside looks blurry or dotted

There are these settings in the Windows Display Graphics, Revit and Rhino should be set to High Performance

Another thing to look at is if another Revit Addin is affecting the display.

I’ve never seen these affect Revit but you can try unchecking GPU tessellation or taking the open GL down a notch. Restarting Revit after changes to Rhino graphics settings.