We are using Unreal with the HTC Vive. I am able to run 4.8 with the VR preview and it works. We started with the First Person template. I removed all translation off the camera and it seems to track correctly.
I am not sure the scale of the world is correct. We build everything in CM but it looks a bit small.
Also, even with a simple blockout environment the framerate is pretty crappy and I believe there are some post effect settings that need to be disabled.
Is there any guidelines for setting up a scene for SteamVR? Also, is there information on using the Vive controllers with Unreal.
I can post to the SteamVR forum but since this is specific to Unreal, this seemed the right place.