ULightComponent

True when this light component has been added to the scene as a normal visible light.

Whether the light should be injected into the Light Propagation Volume

Whether the light should only cast shadows from components marked as bCastCinematicShadows.

Whether to render light shaft bloom from this light.

Enables cached shadows for movable primitives for this light even if r.shadow.cachedshadowscastfrommovableprimitives is 0

After exposure is applied, scene color brightness larger than BloomMaxBrightness will be rescaled down to BloomMaxBrightness.

Scales the additive color.

Scene color must be larger than this to create bloom in the light shafts.

Multiplies against scene color to create the bloom color.

True: take light brightness from IES profile, false: use the light brightness - the maximum light in one direction is used to define no masking.

Whether to use ray traced distance field area shadows.

False: use white (D65) as illuminant.

Whether the light is allowed to cast dynamic shadows from translucency.

Intensity of the shadows cast by primitives with "cast contact shadow" enabled.

Length of screen space ray trace for sharp contact shadows. Zero is disabled.

Where Length of screen space ray trace for sharp contact shadows is in world space units or in screen space units.

Intensity of the shadows cast by primitives with "cast contact shadow" disabled.

Fence used to track progress of render resource destruction.

Brightness factor applied to the light when the light function is specified but disabled, for example in scene captures that use SceneCapView_LitNoShadows.

Global scale for IES brightness contribution.

IES texture (light profiles from real world measured data)

Distance at which the light function should be completely faded to DisabledBrightness.

The light function material to be applied to this light.

Scales the light function projection.

Channels that this light should affect.

Transient shadowmap channel used to preview the results of stationary light shadowmap packing.

Controls how large of an offset ray traced shadows have from the receiving surface as the camera gets further away.

The light's scene info.

Controls how accurate self shadowing of whole scene shadows from this light are.

Scales the resolution of shadowmaps used to shadow this light.

Amount to sharpen shadow filtering

Controls how accurate self shadowing of whole scene shadows from this light are.

Multiplier on specular highlights.

When clearing the light func, e.g. because the light is made static, this field remembers the last value

Color temperature in Kelvin of the blackbody illuminant. White (D65) is 6500K.

Updates/ resets light GUIDs.

Test whether the light affects the given bounding volume.

Test whether this light affects the given primitive.

Set the light func to null, but remember the current value so it can be restored later

Compute current light brightness based on whether there is a valid IES profile texture attached, and whether IES brightness is enabled

Return the world-space bounding box of the light's influence.

Get the color temperature in the working color space.

Script interface to retrieve light direction.

Return the homogenous position of the light.

Check whether a given primitive will cast shadows from this light.

Whether to consider light as a sunlight for atmospheric scattering.

Iterates over ALL stationary light components in the target world and assigns their preview shadowmap channel, and updates light icons accordingly.

Set intensity of the light

Set brightness of the light

Set the Intensity using the brightness. The unit of brightness depends on the light type.

Set color of the light

Set color of the light

Set the MaterialInterface to use for the given element index (if valid)

Set color temperature of the light

Script interface to update the color and brightness on the render thread.

Update the texture used on the editor sprite

Returns full material property path and UObject owner property object Path examples: Material property path with array element and inner struct Materials[0].InnerStruct.Material Material property path with array element Materials[0] Simple material property path Materials

True if our precomputed lighting is up to date

Updates any visuals after the lighting has changed

Used to create any rendering thread information for this component

Used to shut down any rendering thread structure for this component

Called before we throw away components during RerunConstructionScripts, to cache any data we wish to persist across that operation

Called when this actor component has moved, allowing it to discard statically cached lighting information.

UActorComponent Interface

Called to send a transform update for this component to the rendering thread

Called before destroying the object.

Called by the editor to query whether a property of this object is allowed to be modified.

Called to check if the object is ready for FinishDestroy.

Called when a property on this object has been modified externally

Called when property is modified by InterpPropertyTracks

Called after this UObject has been serialized

Presave function.

Handles reading, writing, and reference collecting using FArchive.

Called When light color or brightness needs update

Min roughness effective for this light. Used for softening specular highlights.

Legacy shadowmap channel from the lighting build, now stored in FLightComponentMapBuildData.

Use version that takes FObjectPreSaveContext instead.