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Compositor Mirror
The Compositor Mirror displays what appears in the Rift headset. It has several display options useful for development, troubleshooting, and presenting.
Anything that appears in the Rift headset can be shown in the Compositor Mirror tool, including Oculus Home, Guardian System boundaries, in-game notifications, and transition fades. It is compatible with all games and experiences regardless whether they are developed using the native PC SDK or a game engine.
Finding the Tool
The Compositor Mirror tool is located in C:\Program Files\Oculus\Support\oculus-diagnostics\OculusMirror.exe
Image Display Options
The Compositor Mirror tool has several display options.
Default Display Mode
The default mode is recommended for live presentations and demos. If you double-click OculusMirror from Windows Explorer or run from the command line without specifying any options, the tool displays a 1365x768 window showing a rectilinear view of the right eye image, the Guardian System boundary layer, and the Oculus notification layer.
The other display modes are as follows:
| OculusMirror.exe -leftEyeOnly Display the left eye image in rectilinear view.  | OculusMirror.exe -rightEyeOnly Display the right eye image in rectilinear view.  |
| OculusMirror.exe -rectilinearBothEyes Display both eye images in rectilinear view without Guardian System or notifications.  | OculusMirror.exe -rectilinearBothEyes Display both eye images in rectilinear view with Guardian System boundary.  |
| OculusMirror.exe -postDistortion Display both eye images corrected for lens distortion and chromatic aberration, the Guardian system boundary, and Oculus notifications.  | |
Changing the Window Size
You can change the size of the window by dragging the window borders on the desktop. You can also use the -width pixels and -height pixels parameters to set the size of the window from the command line. If you exceed the resolution of your main display, the window is reduced to fit. These parameters must come before any image mode parameters. For example:
OculusMirror.exe -width 2160 -height 2160 -rightEyeOnly