The Log component calculates the channel-wise logarithm of the color supplied by the Source input to the base supplied by the Base input. The alpha channel is not processed in a channel-wise manner – the resulting alpha channel is taken from the Source input.
Log is a map component, it can be located in the RGB Math category on the Components Bar. This component can output HDR colors. Like other RGB Math components, this component processes its inputs on a channel-wise basis, treating RGB channel values as signed floating-point numbers. For more information, see How Math Components Work.
Provides the source color to calculate the logarithm of. This input can accept HDR colors.
Provides the base color for the logarithm. This input can accept HDR colors.
Specifies the color to output if the operation results in an error (if any channel of the Source color is less than or equal to 0; if any channel of the Base color is equal to 1; or if any channel of the Base color is less than or equal to 0). This input can accept HDR colors.
