You should invoke HDRImageViewer from the directory containing the image you wish to load - UWP apps launched from a command line only have access to files within the working directory.
Parameters
-f Start in fullscreen mode
-h Start with UI hidden
-input:[filename] Load [filename]
Note: Filename must be relative to the current working directory as HDRImageViewer only has access to that directory.
Adds support for launching from the command line.
Command line usage
You should invoke HDRImageViewer from the directory containing the image you wish to load - UWP apps launched from a command line only have access to files within the working directory.
Parameters
-fStart in fullscreen mode-hStart with UI hidden-input:[filename]Load [filename] Note: Filename must be relative to the current working directory as HDRImageViewer only has access to that directory.Example
HDRImageViewer.exe -f -h -input:myimage.jxr