The Chromaticity Set shows the red, green and blue Chromaticity (Hue and Saturation) of the original file as individual layers. Yet this layer set only adds one regular layer to the file size.

Unique qualities of this Layer Set:

Use the Chromaticity Set to edit the Hue and Saturation of your RGB file.

These changes take place independently of the Luminosity (tonal) changes.

The Chromaticity Set of layers is not a straight copy of the RGB channels of the flattened file. It is the Hue and Saturation from the RGB file with the Luminosity stripped from them to provide values that FreeGamma believes represents the richest possible edits.

These layers present the opportunity to use many of Photoshop colour adjustment tools in a different way.

Two important features are:

1. BRIGHTNESS SEQUENCE.
Tools, dialogue boxes use the distribution of Brightness to control the appearance of your file in any mode. Brightness order is a major determining factors in the way your file and the Photoshop tools and dialogue boxes interact. A new Brightness order offers significantly new editing opportunities.

Make a new Brightness order and new editing decisions can be made.

The interaction between the new unique Brightness order of the Chromaticity Set and Photoshop editing devices is responsible for half of the content of the Chromaticity manual.

2 LAYER BLENDING MODES.
Adjustment Layers can be placed at various Layer Blending Modes above the Chromaticity Set. Some Layer Blending Modes can be used to create effects that whilst dramatic, do not overwhelm the appearance of your file as much as if they were used above a regular RGB file.

In a few cases the results that they produce could be reproduced in a regular RGB file – but only by complex dialogue box adjustment.

There are examples of all these in the Lobster Manual.

The individual layers of the Chromaticity Set can also be adjusted by many Photoshop tools to create unique control. These include the Dodge, Burn and Saturation tools.

The separation of luminosity and colour has been a dream of workers in visual imagery. "Lobster" achieves a separation of luminosity and Hue which enables a user to "divide and conquer" these qualities in a file.

Inevitable Saturation changes in the overall qualities in the file occur when changes are made in the Luminosity Layer as well as the Chromaticity Set layers – but the actual Chromaticity Set values remain unchanged.

What is the Luminosity Layer?