What is projector blending and how is it different from stacking?

Projector blending uses multiple projectors aimed at different adjacent sections of a single wide screen, with overlapping edges that are blended together to create one seamless panoramic image. Where stacking puts the same image from the same position, blending puts different slices of a wider image from different positions.

This is how ultra-wide projection screens (like a 45×15-foot display) are created without a single projector that could cover the full width. The blend overlap zone is feathered so the brightness transition is invisible. Blending can be controlled within the projectors themselves, or through external switchers, processors, or media servers.

Read more about projectors in our Comprehensive Guide to Projectors article.