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Enlighten SDK 4.03 Documentation
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  • Welcome to Enlighten
  • How Enlighten works
  • Artist workflow
  • Install Enlighten
  • Libraries
  • Implementation guide
  • Technical reference
    • Output formats
    • Albedo handling
    • Lightmap lighting models
      • Directional irradiance
      • Irradiance with skylight
      • Irradiance-only shading
    • Light probe evaluation
    • Local IBL reflections
    • Light visibility data
    • Custom direct lights
    • Low level precompute API
    • Debugging the precompute
    • The low level runtime
    • Baked lighting
    • Performance tuning
    • Technical troubleshooting
    • Terrain LOD
    • Lightmap LOD
  • Advanced techniques
  • Tools
  • White papers
  • Release notes
  • Third-party licences
    Calendars
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Irradiance-only shading

    This is the documentation for Enlighten.

    Irradiance-only shading

    Oct 31, 2024

    If the only output from Enlighten is the irradiance texture, then the indirect lighting computation is very simple; the intensity will not vary with the normal of the pixel, so all you have to do is read from a texture:

        float3 GetIrradiance(float2 uv, float3 normal)
    {
         return tex2D(g_IrradianceSampler, uv).xyz;
    }

    However, the irradiance value can be augmented with extra data as in the following sections.

    Here, simple irradiance decoding for FP16 textures is assumed; when using LRB format, the decoding is slightly more complicated. See Output formats.

    , multiple selections available,
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