How to use a projector to turn a window into a Halloween frightmare

Cheap projectors have become a popular Halloween accessory for beaming ghosts, bats, or seriously spooky mist on the outside of your house, instantly turning it into a prime venue for attracting trick-or-treaters. The type of projectors I’m talking about here aren’t necessarily video ones, but lamps paired with rotating slides that can be easily stashed behind a tree, bush, or maybe a plastic tombstone where they can create maximum lurid effect within a minimal footprint. But if you own a video projector, either one of the best 4K projectors or the best portable projectors, you can temporarily repurpose it to turn your home’s picture window, or any other front-facing window, into a terrifying outdoor display.

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