Hi,does anyone know how I can manually change or override the IPD/interocular of a camera in Unreal?If I don't want to use what is being set in the user prefs.Ie I want to alter the distance between the two cameras in the stereo pair.CheersFred

Ah yes that page thanks for reminding me!Time to read through properly now then. :)Thanks for your help.CheersFred

The best solution here is almost always to change the scale of the actor that your VR camera is attached to. That will ensure the IPD, head tracking, and FOV correspond and don't make the user uncomfortable.

Heh but I don't want to do that! :) I want to be able to control the interocular myself to make the user feel a different size.I always found it surprising that ipd changes was said to cause discomfort as why would feeling of size do that? I could scale my whole scene and leave the camera to the same effect and player should just feel smaller or larger. I myself is very sensitive to at least motion/vr sickeness and visual imperfections and have not felt weird before when I have cheated the ipd for that effect.Anyhows :) is it possible to do in blueprints?CheersFred

Scaling the camera will make the user feel like the size you scale to. If you only scale the IPD and not the whole camera, it will make the position tracking data (or head model if you don't have position data) seem off. The effect is subtle, but after several minutes of play, some people (not VR developers!) will feel nauseous. The scale is on the Transform component next to the Camera Settings.

Cool that could work better, to scale the camera and not the whole owning character.So the follow up question would then be is there a way to currently get hold of the Config IPD settings? So that I can normalize my change to this?I know there is a make/break HmdUserProfile but I haven't seen a 'Get' HmdUserProfile to see what data comes from the User config?CheersFred

Change/Override Camera IPD/onterocular | Meta Community Forums

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owenwp
Expert Protege
10 years ago
It doesn't modify the scene at all. World scale only affects VR device tracking and rendering at this point, it has nothing to do with the simulation. It is how you define the relationship between game units and real world units.

Maybe there is some sort of bug, but your use case is precisely what that setting exists for.
mkosobucki_seta
Honored Guest
10 years ago
I just had the same problem and found out, that it's implemented.

There are VR settings called
FHMDSettings::CameraScale3D
and
FHMDSettings::PositionScale3D

These values are multipliers used by low-level rendering routines of HMD plugins (at least for Rift and Gear VR, these are the ones I checked). HMD head model and positional tracking offsets are multiplied by them.

As of 4.10, they can be changed on runtime only through console commands:

STEREO CS=0.1
STEREO PS=0.1

Calling as above, results in head model ten times smaller.

Console commands can be called through "Execute Console Command" blueprint node.

To see all possible parameters of HMD, look at
FHeadMountedDisplay::Exec()
in HeadMountedDisplayCommon.cpp

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Change/Override Camera IPD/onterocular

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