{"schema":"record/v1","id":"art_01M5MCRERK5DTDER3VGPSMAB2D","type":"article","revision":1,"etag":"\"r1.s0\"","title":"What do the Common LUT Format, the Adobe .cube specification and OCIO's .cube readers define for LUT size, ordering, domain, bit depth and interpolation?","summary":"ACES CLF v3.0 (aces-docs 7c34c210) requires linear interpolation for LUT1D (at most 65536 entries recommended), defaults LUT3D interpolation to trilinear (tetrahedral optional) and orders LUT3D entries with the third (blue) component fastest, whereas the Adobe Cube LUT Specification 1.0 (Sept 2013) orders red fastest, defines DOMAIN_MIN/MAX (default 0-1), and says table values are set for tetrahedral 3D interpolation. 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Archived copy (2022 capture); the adobe.com original location not re-checked. Specification reading only; no LUT converted. Rights/verification notes are shown as limitations (L00 0019/ADR-0011): they restrict reuse of the cited material or record what was not verified; they are not cleared by this summary.\n\nLimitations: Specification reading only; no LUT converted. 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[component_reuse_restriction] Do not redistribute the Cube specification text commercially.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://github.com/ampas/aces-docs/blob/7c34c2100c8da55cd6f94301125d57e38079fc62/docs/clf/specification/index.md","note":"IA id_ 20220215173646 of cube-lut-specification-1.0.pdf (pdftotext lines 3-20, 189-200, 264, 274-289); aces-docs docs/clf/specification/index.md lines 270-272, 337-353 at 7c34c210"},{"url":"https://web.archive.org/web/20220215173646/https://wwwimages2.adobe.com/content/dam/acom/en/products/speedgrade/cc/pdfs/cube-lut-specification-1.0.pdf","note":"IA id_ 20220215173646 of cube-lut-specification-1.0.pdf (pdftotext lines 3-20, 189-200, 264, 274-289); aces-docs docs/clf/specification/index.md lines 270-272, 337-353 at 7c34c210"},{"url":"https://github.com/AcademySoftwareFoundation/OpenColorIO/blob/10a43ec1df03d072ca9a9e2fb3f26e454b0900d8/src/OpenColorIO/fileformats/FileFormatIridasCube.cpp","note":"IA id_ 20220215173646 of cube-lut-specification-1.0.pdf (pdftotext lines 3-20, 189-200, 264, 274-289); aces-docs docs/clf/specification/index.md lines 270-272, 337-353 at 7c34c210"},{"url":"https://github.com/AcademySoftwareFoundation/OpenColorIO/blob/10a43ec1df03d072ca9a9e2fb3f26e454b0900d8/src/OpenColorIO/fileformats/FileFormatResolveCube.cpp","note":"IA id_ 20220215173646 of cube-lut-specification-1.0.pdf (pdftotext lines 3-20, 189-200, 264, 274-289); aces-docs docs/clf/specification/index.md lines 270-272, 337-353 at 7c34c210"},{"url":"https://github.com/AcademySoftwareFoundation/OpenColorIO/blob/10a43ec1df03d072ca9a9e2fb3f26e454b0900d8/docs/tutorials/baking_luts.rst","note":"IA id_ 20220215173646 of cube-lut-specification-1.0.pdf (pdftotext lines 3-20, 189-200, 264, 274-289); aces-docs docs/clf/specification/index.md lines 270-272, 337-353 at 7c34c210"}]},"tags":[],"type":"article","links":[],"title":"What do the Common LUT Format, the Adobe .cube specification and OCIO's .cube readers define for LUT size, ordering, domain, bit depth and interpolation?","rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"summary":"ACES CLF v3.0 (aces-docs 7c34c210) requires linear interpolation for LUT1D (at most 65536 entries recommended), defaults LUT3D interpolation to trilinear (tetrahedral optional) and orders LUT3D entries with the third (blue) component fastest, whereas the Adobe Cube LUT Specification 1.0 (Sept 2013) orders red fastest, defines DOMAIN_MIN/MAX (default 0-1), and says table values are set for tetrahedral 3D interpolation. 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