I have a media room with a theater setup on one side. The room color is carried throughout except for the screen wall which is black.

I now would like to paint the ceiling and soffits between the PJ and screen wall black also.

How do you feather or transition from the black to the room color ?

I work well with pictures :rolleyes:

I take it that you want some sort of fade effect rather than a sharp line. You can do this with a fairly dry roller pulling from the wet color into the dry color. It won't be a perfectly even blend however. It can be done with a brush. Experiment a bit.

Good luck :)