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Enlighten UE4 3.09 Documentation
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  • Welcome to Enlighten
  • How Enlighten works
  • Install and build
  • Beginner tutorials
    • See what Enlighten can do in Unreal
      • 1: Open the level
      • 2. Run the precompute
      • 3. Turn emissive materials into light sources
      • 4. Add light sources
      • 5. Understand the lighting
      • 6. Lightmaps and light probes
      • 7. Lightmap resolution
      • 8. Light probe resolution
      • 9. Efficient Enlighten lighting
    • Set up Enlighten in Unreal from scratch
  • From static to dynamic lighting
  • How actors interact with Enlighten
  • Lightmap lighting
  • Probe lighting
  • Local reflections
  • Change the lighting resolution
  • World properties
  • Level properties
  • Precompute your level
  • Enlighten light properties
  • Light reflected from the sky
  • Material properties
  • Turn off Enlighten updates in game
  • Mesh destruction
  • LOD for lighting
  • Real-world sun/sky intensity
  • Collaborate on a level
  • Reserved texture samplers
  • Visualizations and statistics
  • Debug with Enlighten tools
  • Convert to vanilla UE4
  • Troubleshooting and support
  • Third-party licences
  • Release notes
    Calendars

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7. Lightmap resolution

    This is the documentation for Enlighten.

    7. Lightmap resolution

    Oct 10, 2019

    Enlighten automatically creates a UV set for every actor lit with a lightmap. This UV set maps pixels from the lightmap onto the surface of the mesh.

    1. To see the lightmap pixels mapped to the actors, in the Show menu, enable Enlighten > Lightmap Charts.

      The colors in the level change to show the different lighting modes.

      Don't worry if the colors in the screenshot above don't match the colors in your level.
    2. Change the View Mode back to Unlit.

      This disables lighting in the level, making the coloration more obvious.

      Each colored area represents one chart. Each square of a chart represents a lightmap pixel. 
      The target lightmap pixel size for each actor changes depending on the Enlighten Quality you choose for the actor.
    3. To see the Enlighten lightmap pixel sizes in the level, in the Show menu, disable Enlighten > Lightmap Charts and enable Lighting Quality.

      Actors that use High quality are shown in blue. Actors that use Medium quality are shown in green. The Medium quality uses a larger target lightmap pixel size.
      This level has been designed so actors that are closer to the ground (and therefore the player's perspective) use higher-quality lighting.
    4. Change the View Mode back to Lit to restore the lighting.

    5. From the Show menu, select Use Defaults to show the level with the default editor visualizations..

      Notice that although the higher building levels use lower-quality lightmaps (larger pixel size), they still have believable indirect lighting.

      Default viewLighting Quality view

    Next

    • 8. Light probe resolution
    , multiple selections available,
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