Settings and Macros/ImageMixer Description
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Mix a foreground image into a background using curves. This basically provides the functionality of a tool's "Blend" or "Dissolve" slider split into separate channels and based on a channel's brightness. It can be used to add the spread curves back to the new Film Grain node or to add grain from a scanned gray card.
Development History and Discussion on PigsFly
Although this macro could be used for various special effects, the main purpose is to act as spread curves for the grain tool: Connect the original image to the main input and the output of the grain tool into the foreground ("Mix Image") input. By default, the LUT splines are set to 1, which outputs the mix image (the grainy image in this case). Modify the splines by adding points and drag them down towards zero to reduce the effect of the foreground image, thus reducing the strength of the grain tool in a certain channel and luminance range. You can also drag spline points above 1 to increase the strength of the grain.
Main Inputs
The following inputs appear on the tool's tile in the Flow Editor:
- Input
-
Background image and source for the LUT splines. Required.
- MixImage
-
Foreground image to be mixed in. Required.
- EffectMask
-
Defines the areas where the effect is applied. Optional.
Controls Tab
A value of 1 will output 100% of the mix image in the selected luminance range, a value of zero will output 100% of the background image.
Slider control. Use this slider to reduce the effect of the tool.
--Tilt
