message: Mention ply and pbrt-parser support
diff: @@ -82,10 +82,10 @@ Visionaray comes with a viewer application that can process wavefront obj files
  After being installed, the viewer application executable can be called using the following command:
  ```Shell
  -vsnray-viewer <filename.obj>
  +vsnray-viewer <file>
  ```
  -where filename.obj is a wavefront obj file.
  +where `file` is either a path to a wavefront obj file, a ply file, or a pbrt file. The latter requires the project to be compiled and linked against [PBRT-Parser][11].
  Documentation
  -------------
  