A postprocessing filter performs a post treatment step on the buffer image. They are chained in the postprocessing node, which defines the full post treatment.
Average auto gain
This filter automatically adjust the image exposure, by applying a linear gain. The gain value is calculated to provide 18% average luminance over the image.
This filter multiplies all values by a constant gain.
This filter applies the gain defined by an ISO Standard Output Sensitivity(SOS), corresponding to the user-selectable gain on a digital camera.
Histogram auto gain
This filter automatically adjust the image exposure, by applying a linear gain. The gain value is calculated to so that the maximum number of pixels is inside a defined good luminance range.
This filter is a tone-mapping filter. It compresses highlights and over-exposed pixels of the image to improve its dynamic range, in a similar way to film or digital cameras.
This filter is a tone-mapping filter. It compresses highlights and over-exposed zones of the image to improve its dynamic range. It detects dark and bright areas and applies different compressions to them, similarly to traditional dodging-and-burning photography techniques.
This filter clamps image values over 1.0 for LDR image encoding, with some quality improvements over plain clamp.
Sphere resolution fix
This filter fixes the high noise level caused by the equirectangular projection at the upper and lower parts of spherical renders
XYZ to RGB
This filter does the color-space conversion from XYZ to linear RGB.