Summary
Lighting in games is a functional design tool as much as a visual one. Beyond supporting realistic or stylised rendering, light is used to direct the player’s eye, mark the path forward, flag points of interest, and set the emotional temperature of a scene. Good lighting often does its work below the level of conscious attention: the player simply finds themselves looking at the right place without knowing why.
Key ideas
- Light as wayfinding. A brightly lit door, lantern, or clearing in an otherwise dark scene pulls the eye toward a gameplay destination. Shadow hides what is unimportant; light declares what matters.
- Warm/cool contrast. Pairing warm accents (firelight, torchlight, sunrise) with cool ambience (moonlight, fog, blue shadow) creates a contrast the eye naturally oscillates between. This keeps the image alive and separates planes of depth.
- Plane separation. Light is used to divide a scene into foreground, middle ground, and background so that objects do not merge into a single mass. Fog and value contrast are common tools here.
- Diegetic light sources. Lanterns, torches, windows, and other in-world emitters justify the lighting artistically while still serving the designer’s guidance goals.
- Mood and atmosphere. The same location can be made tense (red/purple, low key, hard shadows) or calm (green/blue, high key, soft light) almost entirely through lighting choices.
- Gameplay coupling. In survival and horror games, darkness itself becomes a mechanic — restricted visibility creates fear, tension, and player-meaningful information gaps.
In practice
Unity specifics:
- Directional Light sets the dominant scene mood (sun/moon). Changing only its colour temperature and intensity can move a scene between warm day, cool night, and stylised accent lighting.
- Point and Spot Lights anchor local warm/cool contrasts — a warm point light at a doorway against a cool directional light is a direct analogue of the article’s God of War Ragnarök gate example.
- Light Probes and Reflection Probes carry indirect and ambient light into dynamic objects so characters read against the environment rather than floating on it.
- Post-processing (URP/HDRP Volumes) — bloom, colour grading, vignette, and tone mapping finish the job of setting mood and enforcing plane separation. Lighting alone rarely ships without colour grading.
- Fog (linear/exponential, or volumetric in HDRP) is an efficient way to isolate silhouettes and push background objects back in the scene.
Workflow tip from the source: developers should pick a handful of key angles per location — how the player enters, exits, and sees important objects — and light those first. The rest is finalised around those canonical framings.
Evidence
“Light helps direct the player’s eye, highlight contrasts, and show the key focal point: that is, the place that a player should go as well as what awaits them there.” (Sharov, Using Light and Color in Game Development, see source-light-and-color-game-dev)
On God of War Ragnarök: “moonlight places emphasis on the door so that it is the brightest spot in the location. Since the rest of the room is in shadow, this contrast creates a subconscious desire to look at the door.” (Sharov, see source-light-and-color-game-dev)
“Without good lighting, a game is only half ready.” (Sharov, see source-light-and-color-game-dev)
Implications
- Lighting belongs in early level design, not at the end of the pipeline. If a level relies on dark corridors or shadowed rooms to hide guidance cues, re-lighting late is painful.
- Art direction and gameplay direction must agree on what to light. A diegetically reasonable but functionally dim scene still fails if players cannot find the exit.
- Stylised projects can often do more with less — strong coloured accents against flat neutrals read clearly even at low resolution or on small screens.
Open questions
- How far do these principles survive in top-down or isometric games where the camera gives much less depth cue?
- How should lighting guidance be audited for colour-blind players, where warm/cool contrasts may collapse?
- At what point does readable guidance become heavy-handed (“follow the yellow paint”) and start to break immersion?