Show / Hide Table of Contents

    Directional Light

    Directional Light

    Directional Light emits light uniformly from a single direction. Directional Lights are useful for simulating large, distant light sources such as the sun.

    Light Properties

    Directional Light Properties

    Property Description
    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 be completely faded. Use value 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.

    Shadow Properties

    Directional Light Properties

    Property Description
    Mode Describes how visual element casts shadows. Possible options:
    OptionDescription
    NoneNever render shadows.
    Static OnlyRender shadows only in static views (env probes, lightmaps, etc.).
    Dynamic OnlyRender shadows only in dynamic views (game, editor, etc.).
    AllAlways render shadows.
    Cascade Count The number of cascades used for slicing the range of depth covered by the light during rendering shadows. Values are 1, 2 or 4 cascades; a typical scene uses 4 cascades.
    Sharpness Controls shadows sharpness. Can be used to tweak the penumbra width.
    Strength Controls dynamic shadows blending strength. Default is 1 for fully opaque shadows, value 0 disables shadows.
    Distance Light shadows rendering distance (in world units).
    Fade Distance Light shadows fade off distance (in world units).
    Depth Bias Controls dynamic shadows depth bias value. Depth bias 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 the screen-space tracing. Set this to values higher than 0 to enable screen-space shadows rendering for this light. This improves the shadowing details. Actual ray distance is based on the pixel distance from the camera.
    Note

    To learn more about shadows in Flax see this page.

    Volumetric Fog Properties

    Directional Light Properties

    Property Description
    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 shadows casting by this light should be enabled in order to make it cast volumetric fog shadow.
    Note

    To learn more about Volumetric Fog effect see this page.

    • Improve this Doc
    Back to top Copyright © 2012-2021 Wojciech Figat