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Enlighten SDK 3.10 Documentation
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  • Welcome to Enlighten
  • How Enlighten works
  • Artist workflow
    • Radiosity properties
    • Indirect lighting resolution
    • Simplified lightmap UVs
      • Lightmap UV charts
      • Automatic UV simplification
      • Shared lightmaps
      • Mesh projection
      • Simplified UVs with a target mesh
    • Automatic probe placement
    • Local reflection probes
    • Emissive surfaces
    • Light sources
    • Mesh changes
    • Indirect lighting issues
  • Install Enlighten
  • Libraries
  • Implementation guide
  • Technical reference
  • Advanced techniques
  • Tools
  • Enlighten Mobile
  • White papers
  • Third-party licences
  • Release notes
    Calendars
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Automatic UV simplification

    This is the documentation for Enlighten.

    Automatic UV simplification

    Nov 21, 2019

    Automatic UV simplification produces simplified UVs by merging nearby charts that would have similar lighting.

    For many types of mesh, this significantly reduces the number of lightmap pixels required, without any manual intervention.

    Example

    The image below shows a simple modular building mesh.

    Before automatic UV simplification, Enlighten groups the mesh into lightmap UV charts as shown in the images below. This lightmap UV layout requires 28x26 lightmap pixels.

    After automatic UV simplification, Enlighten merges similar charts together as shown in the images below. This lightmap UV layout requires 16x16 pixels, only 35% of the original size.

    Limitations

    If you run into problems with lighting when using automatic UV simplification, check for distorted lightmap UVs.

    This can occur when using automatic UV simplification with cylindrical charts, as shown below. 

    Ideal resultAuto UV result

    To address this, we recommend to configure the mesh to use probe lighting instead.

    If you prefer to use a lightmap, disable automatic UV simplification and author simplified lightmap UVs manually.

    Visualizations

    To help further investigate problems with automatic UV simplification, use the Chart and UV Generation mode in GeoRadiosity.






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