Simple Exposure – Changes the overall exposure of the image. Value range: from -20 to 20.
White Balance – Sets the white balance point using Kelvin temperature, often used in photography. Lower temperature leads to a bluish, cold appearance of the image, while higher temperature leads to a warm appearance. Value range: from 2000 to 99999.
Green-Magenta Tint – Applies green-magenta tint - the complement of temperature in white balance. Setting a negative value results in a magenta-looking picture, while a positive value leads to a greenish picture. The default value of 0.0 has no effect. Value range: from -1 to 1.
Contrast – The difference in brightness between light and dark areas of the image. Values greater than 1 increase the image contrast, and values below 1 decrease it. Value range: from 0 to 99.
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Applying this operator results in nonlinear output. When composing render elements together, this operator has to be disabled to get correct results; for example, when using multi-passes that split the output to reflection/refraction, only linear operations should be used before combining those elements back together.
Saturation – Controls the overall image saturation. Positive values increase image saturation; negative values decrease it. Value range: from -1 to 1.
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Applying this operator results in nonlinear output. When composing render elements together, this operator has to be disabled to get correct results; for example, when using multi-passes that split the output to reflection/refraction, only linear operations should be used before combining those elements back together.
ACES OT – Applies approximate ACES Output Transform, which consists of Reference Rendering Transform (RRT) and Output Device Transform (ODT). Value range: from 0 to 1.
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Applying this operator results in nonlinear output. When composing render elements together, this operator has to be disabled to get correct results; for example, when using multi-passes that split the output to reflection/refraction, only linear operations should be used before combining those elements back together. Value range: from 0 to 1.
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This operator lowers the brightness values in the image highlights. If you are planning to save your image in a high-dynamic range format and edit it in post-production, consider disabling this operator.
Photographic Exposure – Changes the overall exposure of the image based on the settings of the currently used camera.
Tint – Sets the overall color tint of the scene. The entire image is multiplied by this color. This can be used both to add and remove color tint from the image. To add a tint, just select the color of the tint directly. To remove tint from any rendered object, pick its color using the "pick inverse" eyedropper in Corona Improved Color Picker.
Vignette - Simulates real-world camera vignette by darkening the edges of the image. Value range: from 0 to 10
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By default, the following Tone Mapping operators are used for every Corona Camera tagTagas a starting point:
Applying this operator results in nonlinear output. When composing render elements together, this operator has to be disabled to get correct results; for example, when using multi-passes that split the output to reflection/refraction, only linear operations should be used before combining those elements back together.
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This operator lowers the brightness values in the image highlights. If you are planning to save your image in a high-dynamic range format and edit it in post-production, consider disabling this operator.
LUT – Changes the overall look of the image by applying a predefined LUT.
Fancy Bullets
Opacity – Sets the opacity of the LUT transform. A value of 0.0 does not change the result at all, while the default value of 1.0 applies the full-color transform according to the selected LUT file.
Logarithmic – If enabled - the image is converted to the logarithmic color space, and only after that, the LUT is applied.
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The effect of this operator may not be unmapped correctly in the Corona Tonemap Control shader, especially with the logarithmic option enabled or opacity set lower than 1.
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Applying this operator results in nonlinear output. When composing render elements together, this operator has to be disabled to get correct results; for example, when using multi-passes that split the output to reflection/refraction, only linear operations should be used before combining those elements back together.
