Autodesk 12812-051462-9011 User Guide 3 - Page 2504

Lookup-table (LUT) Correction Lookup-table (LUT) correction provides compatibility with the same feature used in other Autodesk Media & Entertainment products such as Combustion and the systems suite: Inferno, Flint, Smoke, and so on. This feature allows studios to implement a consistent way of displaying colors, assuming that their monitors are calibrated to the same reference. Thus 3D artists can produce results that are closer to what the compositor expects by eliminating a variable in the equation: the way colors are displayed on screen. NOTE The lookup table controls available here do not affect exposure control or lighting of the scene. While they do affect the colors of the final image, this is with regard to the display only. By having a reference across a studio (with calibrated monitors), using standardized lookup tables minimizes variability in rendered output. Also, please note that the LUT system of the systems suite is complex and offers a variety of controls and flavors of lookup tables. This feature integrates the View LUTs only, such as that found in Combustion, where only the displayed images are modified. Gamma Correction Gamma correction compensates for the differences in color display on different output devices, so that images look the same when viewed on different monitors, or are used as bitmaps or in printed matter. The calculation of "gamma" is output_intensity = input_intensity(1/gamma). That is, the result is the original value raised to the power of the inverse of the gamma value. One result of this calculation is that a gamma value of 1.0 does not adjust the image at all. Gamma and LUT Preferences | 7759