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SoftClip

Compresses high-dynamic-range (HDR) imagery into the 0-1 range. Because simple color compression changes the apparent chroma and contrast of the image, the conversion control allows for several compression modes that try to preserve colors.

Inputs and Controls

Connection Type	Connection Name	Function
Input	unnamed	The HDR image sequence to compress into the 0-1 range.

Control (UI)	Knob (Scripting)	Default Value	Function
SoftClip Tab
conversion	conversion	none	Sets the color compression mode: • none - no compression is applied. • preserve hue and brightness - if r, g, or b are greater than softclip max, the saturation is reduced to get it below softclip max while preserving the brightness. • preserve hue and saturation - if r, g, or b are greater than softclip max, the brightness is reduced to get it below softclip max. • logarithmic compress - compress all components between softclip min and max through a logarithmic curve between softclip min and 1.0.
softclip min	softclip_min	0.8	Sets the lower clipping limit. All values above softclip min are compressed. NOTE: When using logarithmic compress, this value should be set to 0 or 1 to avoid artefacts for high softclip max values.
softclip max	softclip_max	1	Sets the upper clipping limit. RGB values between softclip min and this value are compressed to be between softclip min and 1.