Light Shafts: How to Make Your Island Look Like a $200,000 Cinematic

You know that feeling when you’re in the lobby, and the lighting is just perfect? Sunbeams cutting through the trees, dust motes dancing in the air, the whole "I spent 400 hours on this map" vibe? Most people think that’s magic. It’s not. It’s Light Shafts.

In this tutorial, we’re going to ditch the flat, boring lighting that makes your island look like a cheap Roblox map. We’re going to turn a standard Directional Light (the sun) into a god-ray-beaming, atmospheric masterpiece using the Light Shaft settings. No coding required—just some slider-slapping and aesthetic genius.

What You'll Learn

• What Light Shafts are: Why they make your world look expensive.
• The Two Pillars of Glory: Bloom (the glow) and Occlusion (the shadows).
• How to configure a Directional Light to create dramatic, moody, or bright atmospheric lighting.
• Pro Tips for balancing brightness so you don’t blind your players.

How It Works

Imagine your game world is a room with a window. If the window is just a hole in the wall, the light comes in flat and boring. But if there’s fog, dust, or smoke in the air, you see beams of light. Those beams are Light Shafts.

In Fortnite/UEFN, we don’t simulate actual dust particles (that’s expensive for performance). Instead, we fake it using two main tricks provided by the Directional Light device (which represents the sun or moon):

1. Bloom (The Glow)

Think of Bloom like the "HDR" setting on your TV. When a light is super bright, the pixels around it bleed color outward, creating a soft, glowing halo. In Light Shafts, Bloom takes the bright parts of the scene and blurs them radially outward from the light source.

• Low Bloom: Subtle, realistic.
• High Bloom: Dreamy, ethereal, or accidentally blinding.

2. Occlusion (The Depth)

Occlusion is how the light interacts with objects in front of the camera. If you have fog in your world, Occlusion tells the engine: "Hey, put shadows inside the fog where objects block the light."

• Without Occlusion, fog looks like a flat gray sheet.
• With Occlusion, fog looks like volumetric smoke with light cutting through it.

Let's Build It

We aren’t writing Verse code for this one. This is pure Editor wizardry. We’re going to take a basic sun and turn it into a cinematic light source.

Step 1: Get Your Sun

1. Open your island in UEFN.
2. Go to the Devices tab.
3. Search for Directional Light. Drag it into your world.
   • Note: This device controls the global lighting, just like the sun in Battle Royale.

Step 2: Enable the Magic

With the Directional Light selected, look at the Details panel on the right side of the screen. Scroll down until you see the section labeled Light Shafts.

By default, everything here is turned Off. We need to flip the switches.

1. Toggle Light Shaft Occlusion to On.
2. Toggle Light Shaft Bloom to On.

Boom. You now have the skeleton of a light shaft system. But it probably looks weird or invisible. Let’s tune the knobs.

Step 3: Tune the Bloom (The Glow)

Under Light Shaft Bloom, you’ll see three sliders. Here’s what they do:

• Bloom Scale: This is the volume knob for the glow.
  • Default: Usually low.
  • Try: Set it to 10.0. Watch the light around the sun flare out. If it looks like you’re staring into a supernova, turn it down to 2.0 or 5.0.
• Bloom Threshold: This determines how bright a pixel needs to be before it glows.
  • Think of it like: The "Elimination Threshold" for your loot. If a player isn’t holding enough HP, they don’t get the healing item. Here, if the pixel isn’t bright enough, it doesn’t get the glow.
  • Try: Leave it at 0.0 for now, or bump it up slightly if the whole screen is glowing.
• Bloom Max Brightness: This caps the intensity so your screen doesn’t turn pure white.
  • Try: 100.0 is usually safe.

Step 4: Tune the Occlusion (The Fog Interaction)

Under Light Shaft Occlusion, you’ll see:

• Occlusion Mask Darkness: How dark the "shadows" in the fog are.
  • Think of it like: The storm damage. If this is 0, the fog is completely uniform. If it’s 1, the blocked areas are pitch black.
  • Try: 0.05 to 0.1 for a subtle, realistic look. Go higher if you want dramatic, high-contrast beams.
• Occlusion Depth Range: This is crucial. It defines how far from the camera the light shafts appear.
  • Think of it like: The Battle Bus drop zone. Only players within this distance get the full effect.
  • Try: 1,000,000.0 (or maxed out) ensures the effect works everywhere on your map. If you set this too low, players far away won’t see the cool beams.

Step 5: The Final Polish

1. Adjust the Directional Light angle. Tilt it so it shines through your trees, buildings, or fog volume.
2. Add a Fog Volume device to your map if you haven’t already. Light Shafts need something to "scattering" off of (like fog or dust) to look good.
3. Playtest. Walk around. Look at the light. Does it look like a AAA game or a Minecraft shader pack? Tweak the Bloom Scale until it feels right.

Try It Yourself

Challenge: Create a "Spooky Forest" vibe.

1. Set your Directional Light to a low angle (simulating sunset/sunrise).
2. Add a Fog Volume with dark gray fog.
3. Crank up the Occlusion Mask Darkness to make the light beams look like they’re cutting through thick smoke.
4. Lower the Bloom Scale so it’s eerie, not bright.

Hint: Think "horror movie trailer," not "summer day at the beach."

Recap

• Light Shafts are the secret sauce for cinematic lighting in UEFN.
• Bloom creates the glowing halo around bright lights.
• Occlusion adds depth to fog by darkening areas where objects block the light.
• Tweak Bloom Scale and Occlusion Mask Darkness to balance between "pretty" and "blinding."

Now go make your island look so good that people forget they’re there to play a game.

References

• https://dev.epicgames.com/documentation/en-us/uefn/UE/building-virtual-worlds/lighting-and-shadows/features-of-lights/light-shafts
• https://dev.epicgames.com/documentation/en-us/fortnite/lighting-and-lumen-quick-start-guide-in-unreal-editor-for-fortnite
• https://dev.epicgames.com/documentation/en-us/uefn/lighting-quick-start-guide-in-unreal-editor-for-fortnite
• https://dev.epicgames.com/documentation/en-us/uefn/environment-light-rig-device-in-unreal-editor-for-fortnite
• https://dev.epicgames.com/documentation/en-us/fortnite/environment-light-rig-device-in-unreal-editor-for-fortnite