For efficient Enlighten lighting, it's important to find a balance between lighting accuracy and cost. See the beginner tutorials for more information.
Lightmap Resolution
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Bounce resolution
For actors with Contribute Lightmap and Contribute Probe lighting mode, you can change the Enlighten Quality. This determines the resolution of Enlighten bounce.
High provides a good balance between accuracy and cost for a human scale interior. This is the default for static meshes.
Choose Medium for open exterior areas. This is the default for Landscape, and the default for all meshes when World Partition is enabled.
Choose Low or Background for distant or unimportant objects.
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To use a different resolution for part of a Landscape actor, use the Landscape tool Manage Mode (Unreal Engine Documentation)
to move components into a different level, then change the Enlighten Quality of the Landscape Streaming Proxy actor.
Lightmap resolution
If you specify a smaller lightmap pixel size for an actor, Enlighten produces more lightmap pixels for each chart. Each Enlighten Quality preset also determines the lightmap pixel size.
Probe resolution
To set the maximum resolution of the probe grid for the entire world, change the Adaptive Probe Grid Spacing in the world properties.
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When the Adaptive Probe Resolution property for an actor is Use Default, it uses the default probe resolution for the level.
Resolution grid
When World Partition is enabled, the world is divided into a grid and you can specify the lighting resolution for each grid cell. To change the size of the grid cells, use Enlighten Resolution Cell Size in the world properties.
With an actor selected, use the Set Cell Quality or Set Cell Probe Resolution menus to assign a lighting resolution for the cell that contains the selected actor.
You can view and edit this grid in the World Partition window. Switch to the Enlighten Cell Quality or Enlighten Probe Resolution mode and zoom in until the Zoom In warning is no longer shown at the bottom left. Cells which have been assigned a lighting resolution value are visible.
Drag a box, right-click and choose Set Quality From Selection or Set Probe Resolution From Selection to assign a lighting resolution for all cells covered by the selection.
