Skylights and custom ceilings?

[coogan]

Hi, everyone. I am new to this forum, and have been working with HD Pro 6.0 for about 10 days.

I have a skylight above a custom sloped ceiling (the ceiling pitch does not match the roof pitch). I figured out how to put 3 sides on the skylight opening by making attic walls, but the 4th "wall" is sloped. All I can figure out is to make another custom ceiling plane to represent the sloped "wall", but positioning it accurately, so far, has proved to be very error-prone and tedious.

Is there another option for creating this angled/sloped skylight opening wall in my ceiling?

Thanks for any suggestions/help anyone can offer.

"Coogan"