How to trim on an angled wall
I'm putting up crown and another 1" trim board about 3" below the crown in my parent's bedroom. Most of the room is square ceilings, but there is a small section where the roof comes down and creates an angled wall surface (1 3/4 story house). I'm ok with the crown, but where I'm having difficulty is where 1" lower trim intersects from the flat wall to the angled wall, both on inside and outside corners. My first thought is to put a filler behind the trim on the angled wall so that the trim piece itself is plump and the miters are at 45's, but I'm afraid that will look unprofessional.