Add grain

Add grain is a Generate effect.

What it does

Add film grain onto a layer.

Parameter	Control	Range	Default	Unit
Intensity	Slider	0 to 200; higher	50	Per cent
Size	Slider	0.5 to 20; down to 0.1 and higher	2	Pixels at composition size
Softness	Slider	0 to 100	50	Per cent
Red	Slider	0 to 200; higher	100	Per cent
Green	Slider	0 to 200; higher	100	Per cent
Blue	Slider	0 to 200; higher	100	Per cent
Monochrome	Checkbox	On or off	Off	-
Shadows	Slider	0 to 200; higher	100	Per cent
Midtones	Slider	0 to 200; higher	100	Per cent
Highlights	Slider	0 to 200; higher	100	Per cent
Animate	Checkbox	On or off	On	-
Seed	Seed	Any whole number	A fresh random seed per instance	-
Mix	Slider	0 to 100	100	Per cent
Blend	Dropdown	Normal · Darken · Multiply · Colour burn · Linear burn · Darker colour · Add · Lighten · Screen · Colour dodge · Lighter colour · Overlay · Soft light · Hard light · Linear light · Vivid light · Pin light · Hard mix · Difference · Exclusion · Subtract · Divide · Hue · Saturation · Colour · Luminosity	Normal	-
Matte	Layer	Any layer in the composition	None	-
Invert	Checkbox	On or off	Off	-
Channel	Dropdown	Luminance · Alpha · Red · Green · Blue	Luminance	-

In the Effect Controls panel:

Matte scales Intensity per pixel: white grains at the full Intensity, grey more finely, black not at all. Invert reads that matte inverted.

Intensity: how strong the grain is.
Size: how big a grain is.
Softness: 0 gives hard-edged square cells.
Red, Green and Blue: how much grain each channel gets, as a percentage of Intensity.
Monochrome: if enabled the grain is monochrome.
Shadows, Midtones and Highlights: how much grain each part of the tone range gets.
Animate: changes the grain pattern each frame automatically if enabled.
Seed: which random grain pattern to use.
Mix: how much of the result replaces the original.
Matte and Invert drive the strength of the effect from another layer’s brightness; see Effects.