HitFilm includes several effects for keying your layers.
Chroma Key
Chroma Key is available in the Composite: Pro Keying Pack.
This advanced keyer provides fine control over your keying.
See Chroma key for full details.
Chroma UV Blur
The UV blur can be essential depending on the way your video camera stores its data.
After keying some video you may notice a pixellated ‘stepping’ around the edge of the key. If this occurs, add a chroma UV blur before the key itself. This will help to smooth out the edge.
Color Difference Key
This is a simpler keyer than the chroma key effect and is used for removing green screen and blue screen backgrounds from video and images.
The View matte option is a quick way to see the layer’s alpha channel, making it easier to identify areas where the key needs to be cleaned up.
Demult
Quickly key out the background from stock footage shot on black and generate an embedded alpha channel. Very useful for compositing smoke, explosions and similar.
Difference Key
Keys areas of a layer based on differences with another layer.
Hue & RGB Key
This effect keys the layer based on a color of your choice. You can pick between using the hue or RGB values.
The View matte option is a quick way to see the layer’s alpha channel, making it easier to identify areas where the key needs to be cleaned up.
You may get better results using the Chroma key.
Luminance Key
This effect keys the layer based on its brightness. This can be particularly useful for sky replacement.