Wide working coordinates. Explicit encoding.

DaVinci Wide Gamut and DaVinci Intermediate describe separate properties. DWG defines primaries and D65 white; Intermediate defines how linear values become nonlinear codes. They commonly work together, but are not one concept.

The pair is intended as a wide working representation, not a finished display standard. Do not assign it to an arbitrary file instead of identifying the actual source. Camera material needs a correct conversion from its known input.

The published DWG coordinates are R = (0.8000, 0.3130), G = (0.1682, 0.9877), B = (0.0790, −0.1155), with D65 = (0.3127, 0.3290). Calculations here use the corrected v1.1 specification.

The blue primary’s negative y is a mathematical basis property, not negative luminance from a blue lamp. Working gamuts may use unrealizable primaries. An ordinary monitor is not expected to physically reproduce this entire basis.

A wide working representation avoids immediately reducing every source to one narrow delivery target. Grading can precede final display preparation. Gamut size itself does not add information to a source.

A Rec.709 file gains no new saturated colours merely by conversion into DWG. Conversion changes coordinates; later clipping, inappropriate operations or limited storage can still lose information. Working width is a capability, not an automatic quality guarantee.

Intermediate has a linear toe around zero and a logarithmic branch above it. In specification v1.1, the linear-input threshold is 0.00262409. Above it: V = (log₂(L + 0.0075) + 7) × 0.07329248. Below it: V = L × 10.44426855.

Negative L uses the linear branch; this formula itself does not clip it. Later tools and storage formats may not preserve it. The lab separately displays the code, inverse result and numerical residual.

In this teaching model, 18% relative grey means L = 0.18, encoded to approximately 0.336043 in Intermediate. L = 1 maps to about 0.513837; L = 100 maps to about 1. These are relative-value correspondences, not automatic monitor-nit assignments.

Exposure is a 2^EV multiplier relative to the selected reference. A nonlinear code range of 0…1 is not a universal floating-point ceiling. Check the actual tool and output format separately.

Nonlinear Intermediate does not mean the image is already display-rendered. Coordinate encoding and image state are different layers. A system may represent scene-referred data nonlinearly for grading convenience.

Consider source decoding, working operations, output rendering and output encoding in order. Values within 0…1 do not prove “finished SDR”. The lab encodes one positive L with DI and ACEScct; differing codes are not differing luminances of two monitors.

DaVinci YRGB Color Managed links identified inputs, working processing and a chosen output. DWG/Intermediate can be the working pair in that process. Verify automatic input identification, particularly for files with incomplete or incorrect metadata.

Settings vary with Resolve version and management mode. Do not copy a menu screenshot without understanding the chain. Record where transforms occur and what a node receives. An extra CST is not needed just because another tutorial adds one.

An explicit chain converts a known input into the selected working representation, performs the grade, then prepares the required output. CST has its own controls; coordinate conversion, white adaptation, tone rendering and gamut limiting do not always reduce to one matrix.

Test no-grade mathematical reversibility separately from creative output rendering. Tone mapping may intentionally change values, so that difference is not automatically a matrix error. Define what should be preserved before diagnosing a result.

A tool’s behaviour depends on its input representation. Addition, blur, keying and LUTs may assume different meanings for values. A DWG timeline does not automatically make every third-party effect aware of that context.

For an effect designed around a specific representation, arrange the necessary transforms and test the result. Include shadows, values above one, saturated edges and alpha where relevant, not just one average frame.

Output must match the task: primaries, transfer, image state, target luminance and format. Moving from a wide working representation to a limited display may require tone and gamut rendering, not just RGB conversion.

Evaluate SDR and HDR versions as separate results. A common base helps, but one setting does not automatically satisfy both. Lighting, saturated details, graphics and visual emphasis need individual review.

DaVinci Wide Gamut is a working basis. Blackmagic camera encodings and their generations describe particular sources. Similar “Wide Gamut” menu wording does not make them interchangeable.

Identify the source from camera documentation, recording mode and decoding, then select its conversion into DWG/Intermediate. An input mistake propagates through the chain; a carefully configured output does not undo it.

Document the working pair, inputs, application version, technical-operation order and output. For intermediate handoff, state whether display rendering is baked in and which values are preserved. “Looks a bit flat” is not an interchange specification.

Inspect the render as a separate artifact: metadata interpretation, levels, appearance and motion. A self-consistent view inside the source project can hide an incorrect automatic interpretation during re-import.