Hotspot Mapping

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Hotspot Mapping is a UV mapping method that compares the parameters of Islands and Trims and makes automatic mapping based on the given settings. The original idea belongs to VALVE.

Tip

Watch the video explaining how Hotspot Mapping works.

To activate Hotspot Mapping you need to use button from Trim Operators (Trimsheet Panel) or from Pie Menu Shift+U on the Sector 1 with holding Shift.

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Hotspot

You can test Hotspot Mapping feature here.

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Hotspot Mapping Operator

Properties

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Preprocess

  • Mode - Use all trims or selected trims to map islands.
    • All Trims - Map in all trims.
    • Selected Trims - Map only in selected trims (Blue Frames).

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  • Orient - Perform some Island rotation before Hotspotting

    • As is - No rotation at all.
    • Orient to World - Orient islands to world.
    • Orient to Axis - Orient islands to nearest axis.

  • Priority - Prioritizing the similarities between the Trim and the Island. Determines the criterion that takes effect first.

    • Aspect - Priority to Aspect Ratio (Height to Width) matching. Good option if you don’t care about different TD between Islands.
    • Area - Priority to Area matching, good for saving approximate TD.
    • World Size - Based on the World Size trim property.
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Hotspot Priority Aspect
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Hotspot Priority Area

Settings

  • Allow Rotation - Allow Islands rotation 90’ to achieve the best results.
  • Keep Proportions - Ensures that the proportions of the UV island remain unchanged when it is moved into a trim.
    • Yes - Keep Islands Proportions.
    • No - Don’t keep Islands Proportions.
    • Trim Settings - Use particular trim properties from Trim Settings - Advanced Settings panel.
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Hotspot Keep Proportions
  • Fit Axis - Where to get the Fit Axis parameter.
    • Automatic - Automatically detect axis.
    • Trim Settings - Use particular Trim properties from Trim Settings - Advanced Settings panel.

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Trim

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Area Matching

  • Area Matching - How to match Trim area with Island area.
    • As is - Islands will be located in Trim with the closest area.
    • Max - Islands will be located in Trim with the largest area. The highest possible TD.
    • Min - Islands will be located in Trim with the lowest area. The lowest possible TD.
    • Manual - Custom Scale.

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  • Matching Scale - The value for manually adjusting the area matching scale. Adjust Scale for Manual settings of Area Matching Conditions. Value 1 is equivalent to As is settings of Area Matching Conditions.

Variability

  • Allow Variability - Variability options to make mapping more unique and less repetetive.

  • Allow Rotation Variation - Allow Islands random rotation 180’ degrees to increase Variability.

  • Allow Location Variation - Allows islands to be placed in other trims with similar parameters. Requires two or more identical trims.
  • Allow Offset Variation - Allows islands to be shifted within the trim if the trim settings permit it. This works only if the Fit Axis option is set to Trim Settings.
  • Variation Offset - The amount by which the shift will be performed, if possible.
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Hotspot Variation Offset
  • Detect Radial - Detect Radial Islands and map them in Trims with Tag ‘HOTSPOT Radial’. Non-Radial Islands won’t be mapped to Radial Trims.
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Hotspot Detect Radial

Tag

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  • Select Radials - Select radial islands.
  • Seed - Islands variability seed.
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Hotspot Seed
  • Aspect Influence - Aspect influence for calculating the correspondence proportions between Trims and Islands.