Content Comparison

...

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?

Export an ST map

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

   Image Modified

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.

The ST map contains information about the distortion of the lens and has four channels: R,G,B,A:

...

Set up a live composure in Unreal Engine

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

   Image Modified

    

   Scroll pagebreak

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.

   Image Modified

3. In the Import dialog box, locate and select the ST map file.

   The ST map is displayed in the Content Browser.

   Image Modified

    

   Scroll pagebreak

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

   Image Modified

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

   Image Modified

    

   Scroll pagebreak

   The default graph for the material looks like this:

   Image Modified

    

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

   Image Modified

    

   Scroll pagebreak

7. Give the node an appropriate name:

   Image Modified

    

   Scroll pagebreak

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

    

   Image Modified

    

   Scroll pagebreak

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

   Image Modified

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

   Image Modified

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

    Image Modified

     

    Scroll pagebreak

11. Add a new AppendVector node:

    Image Modified

    Image Modified

     

    Scroll pagebreak

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

    Image Modified

13. Save the asset:

    Image Modified