UT3 is awesome in VR! Here is a instruction how it works best for me.
There is no vorpx 3D option aviable regulary. You have to change UT3.exe to MirrorsEdge.exe . Now you can select Geometry 3D and Direct VR in the ingame vorpx configuration. Set your resolution to 1600×1800 or 1440×1920. Both works good for me. You can enable this via Nvidia custom resolution setting (inside Windows System Settings) and after this change the UTengine.ini (… my games/documents/Unreal Tournament 3/UTGame/Config..) ResX=1440 ResY=1920. Create an ingame UT-Account even for offline game. You need this to save your ingame settings. Otherwise you have to change it on every restart manually. Set the HUD-Size to 6-7. Disable all HUD stuff you dont need.
Vorpx ingame settings:
3D-Strenght/ Scale: 1.30
Game HUD Scale: 0.55
Game HUD Horizontal: 0.70
Game HUD Depth: 0.80
Dont forget the Direct VR Scan and Recenter Headtracking on start at the first stage.
All other stuff works out of the box for me.
Troubleshooting:
If after a while you ingame suddenly only can see a blackscreen but can open vorpx configuration just as normal and the game sound goes on… – Turn off Crystal Image in vorpx menu.
Suddenly Headtracking dont work? – Restart UT3 or just turn Direct VR off.
You hate the UT-move-bobbing in VR? – Open UTgame.ini and change Bob=0.010 to Bob=0.000 and bWeaponBob=true to bWeaponBob=false.
Have fun guys! :)