Mask Paint Modes in DaVinci Resolve 15

Going over Fusion paint modes for mask nodes.

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Merge
Merge is the default for all masks. The new mask is merged together with the
input mask.

Add
The mask’s values are added to the input mask’s values.

Subtract
In the intersecting areas, the new mask values are subtracted from the input
mask’s values.

Minimum
The input mask’s values are compared to the new mask, and the lowest (minimum)
value is taken.

Maximum
The input mask’s values are compared to the new mask, and the highest (maximum)
value is taken.

Average
This calculates the average (half the sum) of the new mask and the input mask.

Multiply
This multiplies the values of the input mask by the new mask’s values.

Replace
The new mask completely replaces the input mask wherever they intersect. Areas that
are zero (completely black) in the new mask do not affect the input mask.

Invert
Areas of the input mask that are covered by the new mask are inverted; white becomes
black and vice versa. Gray areas in the new mask are partially inverted.

Copy
This mode completely discards the input mask and uses the new mask for all values.

Ignore
This mode completely discards the new mask and uses the input mask for all values.