By default, Enlighten places probes automatically around static actors that are lit with probes.

You can't place individual probes manually. However, you can place probe volumes, areas in which probes are placed.

Movable actors are always lit with probes. To make sure movable actors are lit correctly, place probe volume actors to completely cover the spaces where Movable actors are positioned during gameplay.

Add probe volume actors to the same sublevel as the movable actors that will be lit by their probes. Enlighten adds probes to the sublevel which contains the probe volume.

If the sublevel isn't loaded, the probes in that sublevel can't be used to light movable actors.

In case Volumetric Fog is present in your level, probes should be placed as described in the Light volumetric fog page.

Place probes automatically

Enlighten automatically places probes for:

all the Enlighten Adaptive Probe Volume actors
all static actors lit using probes

To place an adaptive probe volume:

Click Modes > Volumes and drag the Enlighten Adaptive Probe Volume actor into your level.
Use the Geometry Editing tools to adjust the shape and size of the volume.

To avoid creating unnecessary probes, cover only regions of the world in which Movable actors can move.

Enlighten creates probes automatically at the next precompute.

Enlighten automatically removes duplicate probes when Adaptive Probe Volume actors overlap, except when the actors are in different sublevels that use the Blueprint streaming method. To avoid this, split the volumes at the boundary between sublevels, or set the sublevel Streaming Method to Always Loaded.

For more information about streaming methods, see Managing Multiple Levels in the UE4 documentation.

Visualize probes

To see the probes in the level, enable View Mode > Enlighten > Probes.

For more information about visualizations, see Visualizations and statistics.

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