A LUT converts logarithmic images to linear images or linear images to logarithmic images, while maintaining colour accuracy. The LUT Editor node can also be used to apply a conversion to 16-bit floating-point image in the OpenEXR file format.

When you import or export clips in Batch, default LUT parameters are used and the direction of the conversion is detected automatically. Use the LUT Editor to modify these default settings interactively or to import an existing LUT. You can also export a LUT from the LUT Editor.

When you load an OpenEXR-formatted clip into Batch, you cannot connect it directly to nodes that do not support 16-bit floating-point images. To work with a node that does not support this input, first connect the clip to a LUT Editor node to convert the clip into an 8- or 12-bit linear image. Whether or not you change the clip's bit depth, use the LUT Editor's EXR Display option to control the image's luminance and black point properties.

The LUT Editor node can be set to output a bit depth of 8, 10, 12, or 16 bits. You can also manually set the variables for output. See Accessing the LUT Editor in Batch.