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To use a Shogun Live ST map, the first step is to export it from Shogun Live.toc

See also the Vicon video How do I set up a Vicon-driven cine camera in Unreal Engine with lens distortion?

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1. Ensure the video camera(s) have been calibrated, then from the File menu, select Export Video Camera STMap.

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2. In the Save Camera Distortion Map dialog box, locate a folder to which to export the ST maps.
   ST maps for all video cameras are exported to this folder.
   Each filename has the format: <Camera DeviceID>_<focal length in pixels- integer part>_<focal length in pixels - decimal part>_<date time stamp>.exr, for example, vi101_1064_535479_20210623165749.exr.

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1. In Unreal Engine, to import the ST map into the content, right-click to create a new subfolder in the content folder.

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2. Browse to the new folder, right-click and select Import to /Game /Distortion Maps to import the ST map that you exported from Shogun Live.

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3. In the Import dialog box, locate and select the ST map file.
   The ST map is displayed in the Content Browser.
   

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4. In the Content Browser, navigate to Content > VprodProject > Maps and double-click the LiveComp map.

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5. In the Content Browser, navigate to Content > VprodProject > Materials and double-click the M_Live_Comp material.

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   The default graph for the material looks like this:
    
   
   

6. Expand the note and right-click to add a new TextureSampleParameter2D node to the graph:

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7. Give the node an appropriate name:

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8. With the node selected, in the Details panel, find the Material Expression Texture Base. 

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9. Click on the default texture to browse for the ST map and start typing the name of the file.

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   The ST map image is displayed in both the Details panel and the node in the graph.

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10. Drag from the UV's pin on the FG (foreground) node:

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11. Add a new AppendVector node:

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12. To 'undistort' the foreground layer in this example, connect in this way:

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13. Save the asset:

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