Certain garbage mask features are supported only in Batch and the Modular Keyer using the GMask node.
You can use a parameter called Region of Interest (ROI) when drawing multiple garbage masks on a clip to remove the portion of the matte that falls outside of each mask while respecting the area defined by all masks.
ROI enables you to reveal multiple parts of the matte.
Image courtesy of The Post Group
You also have the option of using the Tracer with an advanced gradient. The Tracer is an additional softness tool you can use to pull a key from scratch. This allows you to key images with a lot of detail at the edges. It uses a system of localized keys, called pickers, which analyse the colour information both inside and outside the mask to derive a key for the mask edge. You can use both the Tracer and the advanced gradient within the same garbage mask.
The Tracer is particularly useful for keying challenges such as:
The GMask node supports 16-bit floating-point (OpenEXR) data as input. The Stabilizer and pickers are not available when this type of input is attached to the node.
