v0.1.0-alpha

Pre-alpha. First public build of a VR mod for Mirror's Edge (2008). Shared to gather
reports, not because it is finished — the HUD is broken in VR and this has run on very few
machines. Expect crashes.

No game files are modified. Installing is copying three files into Binaries; uninstalling is
deleting them.

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⚠️ You must play through Virtual Desktop

Mirror's Edge is a 32-bit process and almost nothing ships a 32-bit OpenXR runtime any more.
This was measured, not assumed:

Runtime
VirtualDesktopXR (VDXR)	Works. The only one that does.
SteamVR	Ships no 32-bit runtime at all. Index, Vive and other SteamVR-native headsets cannot run this yet.
Meta / Oculus native (Link, Air Link)	Its 32-bit runtime crashes on startup.

So: a standalone headset, Virtual Desktop with VDXR as your OpenXR runtime, and the
stream already running before you launch the game.

You also need the Visual C++ 2015–2022 Redistributable, x86.
The x64 one you already have does not count. Without it Windows silently declines to load the
mod and the game starts flat with no error — the most likely cause of "nothing happened".

What works

• Native stereo rendering — both eyes rendered by the engine with their own projection,
  every frame. Not reprojection, not a flat screen floating in space.
• 6-DOF head tracking, sampled inside the frame it is drawn for.
• Touch controllers as a gamepad, so the game's own layout applies 1:1 — or keyboard and mouse.

Install

Unzip d3d9.dll, openxr_loader.dll and mevr.ini from the attached mevr-0.1.0-alpha.zip file into the game's Binaries folder, beside
MirrorsEdge.exe. Start the Virtual Desktop stream, then launch the game.

Stereo arms itself a few seconds into the first loaded level, not at the menu.

Three things you will want to know

• PAGE UP recentres the view, any time. A headset put on slightly crooked leaves the world
  tilted, and this fixes it instantly.
• Left stick click is the in-game menu — you need it for the tutorial. Press the left
  thumbstick in. Left grip is jump, because the game puts jump on the left shoulder.
• Set the game's resolution as high as it goes, keep it 16:9, and turn vsync off. The mod
  splits the game's own frame per eye, so the game's resolution is your per-eye resolution. A
  resolution change needs a game restart.

Known issues

• The HUD and in-game menus are split across the eyes and unreadable in the headset. They
  come through the same 2D path as the game's full-screen post passes, and separating them
  properly means giving the overlay its own composition layer. Workaround: glance at the flat
  monitor, which still shows the game normally.
• Resolution is not taken from the headset — see above.
• No weapon or hand anchoring. This is a stereo-camera mod, not a full VR conversion.
• If motion sickness is a problem, try LockAnimPitch and LockAnimRoll in mevr.ini. Leave
  LockAnimYaw off.

Reporting a bug

Open an issue and attach %LOCALAPPDATA%\MirrorsEdgeVR\mevr.log. It names the version, the
runtime, which ini it read, and what the startup sequence was waiting for. A report without it
usually cannot be acted on. Say which headset you used and whether the game reached a loaded
level.

d3d9-0.1.0-alpha.pdb is attached for turning a crash address into a line number. You do not
need it to play.

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The README lists what is planned for alpha and beta, including the real HUD fix, full headset
resolution, snap turn, and hand tracking.
d3d9-0.1.0-alpha.pdb
mevr-0.1.0-alpha.zip