How We Solve Lighting Chaos with Technical Color Keys and Lighting Schemes
Our colour key and lighting scheme methodology delivers precise EV100, color temperature, and HDRP lighting parameters. This eliminates guesswork and reduces iterations from 5–7 to 1–2, cutting lighting budget by up to 40%. One client reported saving $8,000 on a single level using our lighting scheme. We have 10+ years of experience across 50+ projects, ensuring predictable results. Working with colour keys is 3–5 times more efficient than ad-hoc setups—a clear comparison that shows our method is three to five times better than improvisation.
Why Improvisation Fails and Documentation Wins
The most common situation: the art director approved a concept with an atmospheric blue sunset, but the output is muddy. The reason — the colour key contains no technical parameters. Without specifying EV100, color temperature, and source intensities, artists work by eye. Our document includes normalized values for each source, eliminating misinterpretations.
The second problem is the absence of a lighting scheme for different times of day. In open-world projects, a colour key is needed for day, golden hour, and night — each separately. We develop all necessary states so the Level Designer can simply load ready parameters. Our technical documentation is 3-5 times more efficient than ad-hoc lighting setups.
What’s Included in the Deliverables
- Reference sheet in PSD with brightness zone markers and color callouts.
- Lighting spec table listing all source parameters: type, intensity (Lux/candela), color temperature, shadow resolution.
- Gradient map showing tonal range from shadow to highlight.
- Thumbnail grid of 6–9 lighting variants for quick direction selection.
- Animation lighting timeline (for cutscenes or day/night cycles).
- Engine-specific files for Unity HDRP or Unreal Engine 5 with ready-to-use volumes and Light Probe placements.
- Setup guide explaining how to apply the documentation in your pipeline.
- Two revision rounds to ensure perfect fit with your vision.
How We Build a Technically Correct Colour Key
The foundation is the link between visual representation and actual engine values. The colour key is created in two layers: artistic (color and light composition) and technical (specific values for implementation).
Artistic layer: Created in Photoshop or Procreate — quick sketches on blocked-out scene geometry. Here we determine the brightest spot, where the player's eye goes, the saturation of ambient vs. direct light. We rely on visual reference: works of Seiji Yamamoto, GDC presentation: The Lighting of God of War.
Technical layer: Translation into parameters. For Unity lighting in HDRP: Directional Light Intensity in Lux (80 000–100 000 for day), Sky and Fog Volume settings, and HDRP lighting settings. For Unreal Engine lighting with Lumen: colour key is supplemented with an acceptable brightness variance range.
Example: colour key for three dungeon zones
In one project, we developed a lighting scheme for a tiled dungeon: entrance (warm light, EV100=12), deep area (cold, EV100=10), boss arena (contrast, EV100=14). Each zone had its own colour key with source temperature and allowable deviation. Artists worked from the documents without additional approvals. The final build passed approval on the first attempt.
Work Process
- Briefing and analysis of existing materials.
- Creation of thumbnail grid and direction approval.
- Detailed colour key development with technical parameters.
- Documentation of lighting spec and gradient map.
- Final review and handover to the client.
Lighting Approach Comparison
| Parameter | Improvisation Without Documentation | Work With Colour Key |
|---|---|---|
| Iterations to approval | 5–7 | 1–2 |
| Time to set up one scene | 1–3 days | 0.5–1 day |
| Quality | Unstable | Predictable |
| Budget savings | 0% | Up to 40% ($5k–$15k) |
Estimated Timelines
| Scope | Timeline |
|---|---|
| Colour key for one location (1–2 states) | 2–4 days |
| Lighting scheme for entire level (3–5 zones) | 5–10 days |
| Complete lighting bible for the project | 3–6 weeks |
| Revision of existing materials | upon agreement |
Get a Consultation for Your Project
Contact us to discuss your project and evaluate the scope of work. We will help reduce iterations and cut lighting costs. Our certified expertise in game scene lighting and lighting design ensures your project meets the highest standards.