LUTCubeCreator

Creator generates test data rather than deriving a look from a clip. An ungraded cube image supplies an identity mapping: directly connecting it to Apply gives an identity transform, while Analyzer can write an identity LUT. This check is useful before adding any grade.

Horizontal lays samples out as a long horizontal strip, Vertical as a vertical strip, and Rect as a rectangular pattern. These are layouts of a technical structure rather than different color styles. Do not use ordinary Resize to fit the image to timeline dimensions; it disrupts the relationship between pixels and samples.

Size is the sample count along each side of the three-dimensional cube. At 33 there are 33 × 33 × 33 = 35,937 samples; at 65 there are 274,625. A denser table costs more memory and computation and may describe a complex transform more accurately. It neither restores lost values nor guarantees a visible improvement for every look.

Between Creator and its consumer, use operations representable as output RGB determined by input RGB. Suitability depends on the selected tool mode: a static global grade is a useful test, whereas image analysis, coordinate masks, neighboring pixels and time require other information.

The cube image can be processed outside Fusion. The guide recommends 32-bit floating point to preserve color accuracy. Writing and reading must preserve dimensions, layout, sample order and intended values; a display LUT or automatic transform must not silently enter the data.

The two consumers serve different purposes. Apply receives the graded cube through its green image input and transforms a separate main picture. Analyzer receives the cube through orange Input and creates an external LUT on Write File. Creator itself does not write a .cube file and is not an ordinary editing test-pattern generator.