Median Node

The Median effect lets you reduce the noise in a drawing while preserving its edges. Harmony sorts the values of pixels within a specified radius and uses the median value. You can also use this effect to create a Impressionist type of style.


The Luminance-Threshold node takes a bitmap image as its input and outputs a bitmap image in which pixels that do not pass the threshold are filtered out.

Optionally, it can also be connected to a matte image. In this case, only the parts of the input image that intersect with the matte will be affected by the effect.

Layer Properties

Parameter Description

Allows you to enable or disable the node. When disabled, a node has no visible effect on the rendered image, nor on the preview in the Camera, Perspective, Side and Top views.

Colour Swatch

Sets the colour of the layer in the Timeline view and of the node in the Node view.


The name of the node as it appears in the Node View and the Timeline view. Each node must have a name that is unique to its containing group.


Lets you specify the size of the area of values to consider determining the median value. A median is calculated by sorting all the pixel values from the surrounding area into numerical order. Then the middle pixel value is used to replace the pixel being considered.

The median tends to make an image look a bit blurrier because it reduces the contrast of adjacent pixels. However, it does a good job of smoothing the image and removing artifacts.

Colour Depth

Determines the number of levels per colour channel. The larger the number, the more levels of colour are used in the image and the more time it takes to render. Conversely, the lower the colour depth, the fewer colours are used, the faster it is to render.

Invert Matte

Inverts the matte used to generate the effect. By default, the effect is applied to the opaque areas of the matte drawing. When this option is enabled, the effect is applied to the transparent areas of the matte instead.