How do I soften the visible border of my projection?
If you are creating a Wall, Hollusion, or 3DFX mode decoration with a blank background, you might notice the rectangular edges of the projector's frame around your decoration. These edges are visible because projectors must project light even when the projected image is black. The best way to soften the edges of your projection is to adjust the contrast and brightness settings of your projector until you find a better result.
You may also want to consider making a "diffuser" for your projector using some cardboard and some wooden dowels. Click here for a handy article about creating a "diffuser" effect for your decorations.
The best way to manage these edges is to use a digital projector with a very high contrast ratio. If your projector has a low contrast ratio, it may be hard to avoid. Contrast ratio is the ratio of the brightest and darkest image a projector can create. For example, the Digital Decorating Kit Plus has a 500:1 contrast ratio, which means a completely white projection would be 500 times brighter than a completely black projection.