Which statement about LUTs is true?

• A. LUTs are mathematical conversions and do not carry masking information.
• B. LUTs are video files with alpha channels.
• C. LUTs apply color corrections that modify gamma only.
• D. LUTs store masking information like Power Windows.

Answer: (A)

LUTs encode a mathematical color transformation. They map input color values to output values through a precomputed table, applying a defined look or color space/gamma change across the image. This transformation is applied uniformly to the pixels (unless you nest the LUT under a masked node, but the LUT itself does not contain any masking data). Because they are just a lookup of color values, LUTs do not carry masking information like Power Windows or other region-based masks, and they are not simply video files with alpha channels. They can affect more than gamma—adjusting contrast, saturation, hue, and the relationships between color channels—depending on how the LUT is created.