# roblox-lighting

A skill for Roblox lighting, atmosphere, day/night cycles and post-processing. Useful when a scene looks flat, too dark or washed out.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 2200 installs · ★ 127
- Author: TabooHarmony
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/TabooHarmony/roblox-brain/tree/HEAD/skills/gameplay/roblox-lighting/SKILL.md
- Updated: 2026-10-15
- HTML: https://affpapa.org/en/nevibecode/skills/roblox-lighting

## What it does

The skill loads when you set up or change Roblox lighting: `Lighting` properties, `Atmosphere`, a day/night cycle, post-processing effects. It ships a quick reference with property ranges and defaults, tables of effects and local lights, and a ready Luau snippet for a day/night cycle.

There is a pitfalls section. `Brightness` above 3 washes the scene out, `Density` above 0.5 turns the air into soup, and it advises against more than 2-3 post effects. Keep shadow-casting lights to 4-6 visible and set `Shadows=false` on the rest — that matters on mobile.

Lighting technology and its replacements are Studio-only; those properties are not script-writable. The skill tells you to verify enum values and device behaviour against current Creator Hub docs. Mood presets, zone tweens and full examples live in `references/full.md`.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add TabooHarmony/roblox-brain --skill roblox-lighting -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/roblox-lighting/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/roblox-lighting/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add TabooHarmony/roblox-brain --skill roblox-lighting -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/roblox-lighting/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add TabooHarmony/roblox-brain --skill roblox-lighting -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/roblox-lighting/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install TabooHarmony/roblox-brain roblox-lighting
```

2. **Manually: put the files in place**
- File: `.github/skills/roblox-lighting/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add TabooHarmony/roblox-brain --skill roblox-lighting -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/TabooHarmony/roblox-brain --path skills/gameplay/roblox-lighting
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/roblox-lighting/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add TabooHarmony/roblox-brain --skill roblox-lighting -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/TabooHarmony/roblox-brain/tree/HEAD/skills/gameplay/roblox-lighting/SKILL.md

## When to use it
- set up `Lighting` and `Atmosphere` so a scene stops looking flat
- build a day/night cycle in Luau
- pick post-processing effects without stacking too many
- cut shadow cost on mobile devices
- debug shadows pointing the wrong way or a washed-out image

## Example prompts
- set up Roblox lighting for an evening scene
- add a day/night cycle in Luau
- the scene looks washed out, check the `Lighting` settings

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: d62d7cee42a1afb1.

BEGIN THIRD-PARTY FILE d62d7cee42a1afb1
````text
---
name: roblox-lighting
description: "Use when setting up or changing Roblox lighting, atmosphere, day/night cycles, or post-processing effects."
when_to_use: "Also when a scene looks flat, too dark or washed out, shadows are wrong, or lighting hurts mobile performance."
last_reviewed: 2026-07-26
sources:
  - https://raw.githubusercontent.com/Roblox/creator-docs/main/content/en-us/environment/lighting.md
  - https://raw.githubusercontent.com/Roblox/creator-docs/main/content/en-us/environment/atmosphere.md
  - https://raw.githubusercontent.com/Roblox/creator-docs/main/content/en-us/environment/post-processing-effects.md
---

# Roblox Lighting & Atmosphere

## When to Load

Load for Roblox lighting, atmosphere, day/night, or post-processing (Bloom, ColorCorrection, DepthOfField).

## Quick Reference

### Lighting Service
```luau
Lighting.ClockTime = 14            -- 0-24 numeric
Lighting.Brightness = 2            -- 0-10, default 2
Lighting.Ambient = Color3.fromRGB(70, 70, 70)        -- shadow fill
Lighting.OutdoorAmbient = Color3.fromRGB(128, 128, 128)
Lighting.GlobalShadows = true
Lighting.ShadowSoftness = 0.2      -- 0=sharp, 1=soft
-- Configure tech/style/quality in Studio; these properties are not script-writable.
-- Verify enum values and device behavior against current Creator Hub docs before setting them.
```

### Atmosphere
```luau
local atmo = Instance.new("Atmosphere")
atmo.Density = 0.3    -- 0=clear, 1=opaque (keep <0.5)
atmo.Offset = 0.25    -- 0=ground, 1=sky
atmo.Color = Color3.fromRGB(199, 199, 199)   -- near fog
atmo.Decay = Color3.fromRGB(92, 92, 92)      -- far/horizon
atmo.Glare = 0        -- 0-10
atmo.Haze = 0         -- 0-10
atmo.Parent = Lighting
```

### Post-Processing (all parented to Lighting)
| Effect | Key Properties |
|--------|---------------|
| `BloomEffect` | Intensity (0-1), Size (px), Threshold (>0.7 recommended) |
| `ColorCorrectionEffect` | Brightness, Contrast, Saturation (-1 to 1), TintColor |
| `DepthOfFieldEffect` | FarIntensity, FocusDistance, InFocusRadius, NearIntensity |
| `SunRaysEffect` | Intensity (0-1), Spread (0-1) |

### Day/Night Cycle
```luau
local CYCLE_SPEED = 1  -- minutes per full day
task.spawn(function()
    while true do
        Lighting.ClockTime += (task.wait() / 60) * (24 / CYCLE_SPEED)
        if Lighting.ClockTime >= 24 then Lighting.ClockTime -= 24 end
    end
end)
```

### Local Lights
| Light | Use | Key Props |
|-------|-----|-----------|
| `PointLight` | Lamps, torches | Range, Brightness, Color |
| `SpotLight` | Flashlights | Range, Angle, Face |
| `SurfaceLight` | Screens, panels | Range, Angle, Face |

**Perf:** Limit shadow-casting lights to 4-6 visible. Use `Shadows=false` on most. Neon material = cheap glow.

**MCP:** Inspect, change minimally, capture, check performance.

### Common Pitfalls
- Brightness >3 washes out. Density >0.5 = soup. Max 2-3 post effects.
````
END THIRD-PARTY FILE d62d7cee42a1afb1

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