When using a Da-Lite high power screen, does the color of the wall directly behind the screen make a difference in picture quality? The walls are a beige/tan in color and are textured. The screen will be going on a 150" wide wall and the screen is 116" wide. This means there will be 17" of wall on both sides of the screen. Should I hang dark colored / velvet drapes in the corners to cover up that 17" of wall? The screen will hang 7" away from a white textured ceiling. Will this have a big effect on picture quality?