Notch Reference Manual

Barrel Distortion

Method

This node can be used to simulate distortions in real-world camera lenses. It creates a bulging or pinching effect from the centre of the image. See Wikipedia for more information.

Raw texture Processed texture
Example Nodegraph

Attributes

Name Description
Active Turn the effect on or off. Values < 0.1 will turn the effect off, and deferred rendering must be on.
Blend Amount Changes the opacity of the new effect over the original image.
Blend Mode (RGB) Change how the generated effect blends with the parent image RGB.
Blend Mode (Alpha) Change how the generated effect blends with the parent image alpha.
k1 First radial distortion coefficient. Barrel distortion typically will have a negative term for k1 whereas pincushion distortion will have a positive value.
k2 Second radial distortion coefficient.
k3 Third radial distortion coefficient.
Distortion Scale X The distortion scale amount in X.
Distortion Scale Y The distortion scale amount in Y.

Affect Channels

Select which of the RGBA colour channels are affected by the effect.

Inputs

Name Description Typical Node Input
Active Turn the effect on or off. Values < 0.1 will turn the effect off, and deferred rendering must be on. Envelope Modifier

Outputs

There are no outputs from this node.