Tutorial
Colour management from CGI render to final video
A controlled SDR handover approach for CGI and edited video, with checks that distinguish source interpretation, viewing transforms and output settings.
Predictable colour starts with a documented handover between applications. Know what the render contains, how the editor interprets it and which output the film is meant for. Check a short representative sample before treating a visual mismatch as a grading problem.
Separate the file from the way it is being viewed
A render can look different after import because the receiving application interprets or displays it differently. Before grading it to match a screenshot, identify what the file contains and which transformations each application applies.
Record the render's colour space and whether its appearance is already display-referred or still needs a viewing transform. A linear intermediate and a finished SDR image are not interchangeable. Do not assume that a filename, file extension or a familiar preview establishes the correct interpretation.
Choose one controlled SDR route
For an illustrative workflow, choose a finished Rec.709 SDR render master from the CGI stage, then use it in an SDR editing sequence. The renderer's output conversion should be intentional, and the delivered file's interpretation should be documented for the editor. Verify that handover with a short representative test in your own installation.
Blender's Displays and Views documentation distinguishes applying the viewing transform when saving images from keeping a linear intermediate. Its video-output section also discusses choosing the output colour space. Check those controls in the documented version rather than assuming every saved file has the render-view appearance baked in.
If you instead choose a linear OpenEXR workflow, agree the receiving colour-management configuration with the compositor. Do not silently put that intermediate through the display-referred route described here.
Check input, working space and output in the editor
In Premiere, confirm how the incoming clip is interpreted before making creative corrections. Use an SDR sequence configuration appropriate to the agreed source and output. Adobe's sequence documentation separates the working colour space from the output colour space; those settings have different jobs.
For the proposed Rec.709 SDR route, verify the clip, sequence and export against the same agreed target. If an automatic conversion is active, understand what it is converting. Avoid adding a creative LUT merely because two previews look different: that can hide an interpretation problem and introduce a second transformation.
Keep a simple reference render containing the actual product, a neutral area and important brand colours. Use it to inspect the handover before rendering a long sequence.
Find the stage where the mismatch appears
Compare a short test at several points: the renderer's saved output, the imported clip, the sequence and the exported edit. Where possible, reimport the export into the same managed project to compare like with like. Record settings with the test so a later change is traceable.
If the export matches inside the project but differs in another player, investigate the player's and display's interpretation before changing the whole grade. Different viewing environments can complicate a comparison; a screenshot is not a reliable replacement for an agreed output specification.
For brand-critical material, use an appropriate monitored review process and an approved reference. A good-looking result on one uncalibrated screen does not prove precise colour reproduction.
Deliver the context with the picture
Include the output colour target, relevant render/view settings and any intended creative transform in the handover note. Keep the intermediate and finished-master roles distinct, especially if both are supplied.
Use this final check:
1. The source file's colour interpretation is known.
2. A viewing transform is applied where intended, without accidental duplication.
3. Sequence working and output settings are deliberate.
4. The export has been compared with the approved reference.
5. The recipient knows which file is the viewing master.
This does not eliminate differences between every device. It gives the production team a controlled starting point and a practical way to locate a mismatch before trying to correct it by eye.
Sources and visual references
- Displays and Views — Blender Manual 5.1
Blender Manual 5.1 reference for view application, intermediate renders and output colour space.
- Customize color presets for new or existing sequences — Adobe Premiere documentation
Adobe’s illustrated sequence colour-management controls separate working and output spaces.
Related reading
Cover image
- Cover illustration: Logan Voss / Unsplash.
Illustrative colour gradient, not a calibrated test chart.
- Image licence — Unsplash
Free use, including commercial use, under the Unsplash License.
