Colour Selector Node

The Colour-Selector node filters colours in the input image and outputs an image containing only the selected colours. The colours to display can be selected in the Layer Properties of the Colour-Selector.

The Colour-Selector does not just cut out the colours that are not selected from the input image, it outputs the image it is connected to as if these colours were invisible. Hence, if two brush strokes with different colours overlay each other, and the colour of the overlaying brush stroke is filtered out, the underlay brush stroke will not be cropped, it will display as if the overlay stroke did not exist.

NOTE The Colour-Selector node works exactly as when using the Render Selected Colours Only tab of the Colour Override node, except that it is made for that specific purpose, allowing the use of this feature to be more simple and streamlined.

Connection

To use the Colour-Selector, simply connect it as the intermediary between an image output (such as a drawing or composite's output port) and an image input (such as a composite's input port):

The Colour-Selector node will take the input image and output the image without the colours that are not in its colours list in its layer properties. By default, no colours are in the Colour-Selector's list, so the output image will be completely invisible until colours are added.

Properties

Parameter	Description
Name	Allows you to enter a name for the node.
Apply to Matte Ports on Input Effects	By default, the Colour-Selector does not filter out colours in drawings that are connected to the matte port of a node. This is because drawings connected to a matte port are used for their shape and transparency levels, and not their colours. If this option is checked, the Colour-Selector will filter out the colours that are not in the list, even in drawings that are connected to a matte port.
Add Colour Menu	The Add Colour menu allows you to add colours to the list of selected colours. You must add colours to the list for the Colour-Selector to know which colours to let through. The Add Colour menu has three sections: The palette list: The first section lists all palettes in the scene. When you select one of the palettes, it will list all the colours in that palette. This allows you to add any colour available in your scene to the list of selected colours. The drawing list: The second section lists all drawings connected to the Colour-Selector node. When you select a drawing, it will only list the colours used by that drawing. This allows you to quickly select a colour that is used by one of the drawings being filtered, without having to go through every colour in the scene. Add All Colours: This option will instantly add all colours used by all drawings connected to the Colour-Selector node. You can then remove the colours you want to hide using the Remove Colour button. This can be useful if you only want to filter out a few of many colours.
Remove Colour	Removes the selected colour from the list.
Selected colour list	The list of colour that the Colour-Selector will let through. Every other colour in the input image will be filtered out.