A Directional Light emits light uniformly from a single direction. Directional Lights are useful for simulating large, distant light sources such as the sun.
|Color||Light emission color.|
|Brightness||Light brightness parameter. Controls intensity of the light emitted by this actor.|
|View Distance||Controls light visibility range. The distance at which the light becomes completely faded. Use a value of 0 to always draw a light.|
|Minimum Roughness||Controls the minimum roughness value used to clamp material surface roughness during shading. Can help with softening specular highlights.|
|Mode||Describes how a visual element casts shadows. Possible options:
|Cascade Count||The number of cascades used for slicing the range of depth covered by the light during shadow rendering. Values are 1, 2 or 4 cascades; a typical scene uses 4 cascades.|
|Sharpness||Controls shadow sharpness. Can be used to tweak the penumbra width.|
|Strength||Controls dynamic shadow blending strength. Default is 1 for fully opaque shadows, a value of 0 disables shadows.|
|Distance||Shadow rendering distance (in world units).|
|Fade Distance||Shadow fade off distance (in world units).|
|Depth Bias||Controls dynamic shadow depth bias value. Depth bias is used for shadow map comparison.|
|Normal Offset Scale||Controls dynamic shadows normal vector offset scale. A factor specifying the offset to add to the calculated shadow map depth with respect to the surface normal.|
|Contact Shadows Length||The length of the rays for contact shadows computed via screen-space tracing. Set this to values higher than 0 to enable screen-space shadow rendering for this light. This improves the shadowing details. Actual ray distance is based on the pixel distance from the camera.|
To learn more about shadows in Flax see this page.
Volumetric Fog Properties
|Scattering Intensity||Controls how much this light will contribute to the Volumetric Fog. When set to 0, there is no contribution.|
|Cast Shadow||If checked, light will cast a volumetric shadow to Volumetric Fog. Also shadow casting by this light should be enabled in order to make it cast volumetric fog shadows.|
To learn more about Volumetric Fog effect see this page.