This is the documentation for Enlighten.

6. Lightmaps and light probes

Enlighten lights actors using either lightmaps or light probes. Let's see how these work.

  1. Make sure the View Mode is set to Lit.
  2. In the Outliner, select the DirectionalLight.
  3. In the Details pane, under Transform, set the Rotation to X: 0.0, Y: -50, Z: -150.

    This angles the sun so that only part of the level is lit with direct light. This will make the effect of the indirect lighting provided by Enlighten easier to see.

  4. To see the lighting mode for every actor in the level, in the View Mode menu, choose Enlighten > Lighting Mode.

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

    Meshes lit with lightmaps are orange. Lightmaps are good for meshes with large continuous surfaces, such as walls or the ground.
    Meshes lit with probes are green. Probe lighting is good for complex meshes such as trees, characters and small objects.
    Meshes that share lightmaps with nearby meshes are blue. This is covered in the next tutorial.
  5. Change the View Mode back to Lit to restore the lighting.

  6. In the World Outliner, double-click the actor Props_LampPost2 to focus on it.

    This actor is placed in a part of the level that is not directly lit by the sun, so it's easy to see the effect of Enlighten indirect lighting.

    Notice there are no obvious lighting inconsistencies across actors that use different lighting modes, such as the lampposts and trash bags (which use light probes) and the ground and walls (which use light maps).

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