Notch Reference Manual

Vector Blur

Method

Performs a blur operation on an image, but instead of blurring around each pixel uniformly the blur follows a path through the image. The path is determined by vectors extracted from the image itself. They point in the direction of gradients in the image, for example in the direction of a downward slope in image luminance. The result is a blur that conforms to details in the original image and produces a look similar to a traditional painting.

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.
Steps The number of steps that will be taken along the path for a single pixel.
Gradient Blur Iterations The number of pre-blurring operations to perform on the extracted gradient vectors. This helps reduce artifacts in the end result.
Orientation An offset applies to the rotation of the extracted gradient vectors.
Softness Controls how much influence points further along the path have.
Step Size Size of each step taken along each path.
Dampening Controls how much influence the gradients have on the acceleration of the movement along the path.
Epsilon Controls how finely the gradients are calculated. Raising this value may help reduce artifacts or precision issues.
Normalize Normalizes the gradient vectors, so the gradient magnitude isn’t used when calculating the paths.
Fixed Direction If enabled, the effect will use only one calculated gradient for the whole path when blurring a pixel. This means the path is a straight line.

Affect Channels

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

Inputs

Name Description Typical Node Input
Direction Source Add a texture whose luminance values will be used to drive the Vector blur directions instead. Video Source

Outputs

There are no outputs from this node.