Iris wipe

Iris wipe is a Transition effect.

What it does

Opens a hole in the layer, which expands until it wipes the entire frame.

Parameter	Control	Range	Default	Unit
Iris centre x	Slider	0 to 3840; any value by typing	960	Pixels at composition size
Iris centre y	Slider	0 to 2160; any value by typing	540	Pixels at composition size
Iris points	Slider, whole numbers	6 to 32	6	-
Outer radius	Slider	0 to 2000; higher	330	Pixels at composition size
Use inner radius	Checkbox	On or off	Off	-
Inner radius	Slider	0 to 2000; higher	165	Pixels at composition size
Rotation	Dial	Any angle; snaps every 15° while a modifier is held	0°	Degrees
Feather	Slider	0 to 500; higher	0	Pixels at composition size
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:

Inner radius is editable while Use inner radius is on.
Matte scales the iris radius per pixel: the polygon opens wide where the matte is bright and shuts to nothing where it is black, this effect having no Completion to scale. Invert reads that matte inverted.

Iris centre x and Iris centre y select the centre position of the wipe.
Iris points sets how many corners the polygon has.
Outer radius sets how far the corners reach.
Use inner radius turns the polygon into a star by pulling every other corner in to Inner radius.
Inner radius sets how far the pulled-in corners sit.
Rotation turns the shape.
Feather softens the edge.
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.