Hue fieldDisplays the colour range in the image before the glow effect is applied.

Saturation fieldDisplays the colour purity level in the image before the glow effect is applied.

Contrast fieldDisplays the level of gradations between light and dark areas before the glow effect is applied.

Gamma fieldDisplays the level of grey in the image before the glow effect is applied.

Gain fieldDisplays a value by which pixel colour values are multiplied. The offset value is added to this value to determine the final colour.

Offset fieldDisplays the value to add to current pixel colour values (the resulting colour value is clipped at 0).