.SUL File

.sul is Gfa Raytrace image

Key Features: .SUL File Extension

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The sul file extension was used by the Gfa Raytrace, a ray tracing program.

The sul file stores image from Gfa Raytrace. Seems to be obsolete program without support from developer.

Use XnView to work with *.sul files.

XnView is able to export *.sul files to other formats.

Associate the SUL file extension with the correct application. On :
Windows: Right click on any SUL file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.SUL files". Mac: Right click (or Ctrl-click) the SUL file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
Update your software that should actually open .SUL is Gfa Raytrace image. Because only the current version supports the latest SUL file format. Search, therefore, e.g. on the Pierre-Emmanuel Gougelet manufacturer website after an available .SUL is Gfa Raytrace image update.
To make sure that your SUL file is not corrupted or virus-infected, get the file again and scan it with antivirus software.