crown moldings

[soniz]

I would like tips on which moldings are most suitable to use on sloped ceilings where the angle of the ceiling is about 50 degrees down towards the outer wall.
I have used cove molding in other parts of the house but they do not fit well when the angle between the ceiling and wall is not 90 degrees.
Grateful for tips!!

 

[DanielByggare]

Some type of quartz rod perhaps. Or self "modify" some other type of molding, like crown molding, shadow molding, or smyglist...