Reflective materials are also a no-no.Don’t have the subject wear or hold anything green or else the areas will be transparent once chroma-keyed. Otherwise, if let’s say your actor is wearing a bright green tie in front of a green screen, he’ll end up with a transparent strip down his chest where the tie is supposed to be! The key rule is no matching colours! The background has to be a completely different colour from the subject. You wouldn’t be able to film Kermit the Frog against a green screen-he’d disappear! In this case, you’d typically use a blue screen, the “second-in-line” colour. the actor’s clothes, eyes, hair, accessories).īut green doesn’t work for everything.

A vibrant, almost neon green is the standard choice because it’s strong and usually a distinctly different colour from anything on the subject (e.g.

Technically, you can use any colour background. When used with more sophisticated 3D techniques, this process can add any new element (smoke, fire, rain, etc.) to complex moving shots.This lets the other image to show through. The chroma key singles out the selected colour (usually the green) and digitally removes it by rendering it transparent.two images or video streams are layered together) into the shot. The new background is composited (i.e.When a background isn’t available-like a fictional, alien, historic, futuristic or even just hard-to-access location-green screen comes to the rescue!Īfter the footage is shot, the compositors take over: It’s used in film production (and also in news and weather reports) to relatively simply place the desired background behind the subject/actor/presenter. Green screen basically lets you drop in whatever background images you want behind the actors and/or foreground. It’s hard to miss the sheer amount of green you see on set. Think about behind-the-scenes clips or bloopers reels from Hollywood movies. Green screen is a visual effects (VFX) technique where two images or video streams are layered-i.e.

Movie magic tutorial