What are the two different types of LUTs?

• A. 1D and 3D
• B. 2D and 3D
• C. 1D and 2D
• D. 3D only

Answer: (A)

LUTs come in two main forms: 1D and 3D. A 1D LUT maps each color channel (red, green, and blue) independently with its own one-dimensional curve. This makes it ideal for simple adjustments like gamma, brightness, or per-channel contrast changes where you don’t want to alter how colors relate to one another. In contrast, a 3D LUT maps colors using a three-dimensional table that accounts for how red, green, and blue values combine together. This lets you transform hues, saturations, and luminance in a coordinated way, enabling complex color grades, film looks, or camera color-space conversions. The key idea is recognizing these two distinct types are what you’ll typically encounter: per-channel adjustments with 1D, and full color-space transformations with 3D.