Visible lag when attaching objects to camera

Development Cinematics & Media
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1

When attaching an object to the camera of a character in VR, there is a lag when the camera is moving.
In the gif attached, you can see what happens when moving the HMD with a static mesh(cube) attached to the camera by drag&drop in the blueprint editor.

There was a recent bug fix about camera lag which can be related: UE-31787 Vive: Positional Latency w/ Rotation
I am currently using 4.12.5, which includes this fix.

98764-lagobjectattachedtocamera.gif

How to reproduce:

  • Create a new project
  • Create a new character blueprint
  • Add a camera to the capsule
  • Add a static mesh close to the camera (becomes really visible below 60cm)
  • Click VR Preview & Vomit

Those are also the steps indicated in the official VR Camera guide: https://docs.unrealengine.com/latest/INT/Platforms/VR/VRCameraRefactor/index.html#settingupobjectstofollowthehmd

https://docs.unrealengine.com/latest/images/Platforms/VR/VRCameraRefactor/VR_Follow_HMD_Setup_02.jpg

2

Any news on this issue? :slight_smile:

3

I have the same issue. Especially if the mesh is dynamically changing or updating (etc Set Static Mesh or by attaching TextRenderer)

4

Same here (UE 4.12.5).

It seems to be a known issue (Draw enemy HUD - Rendering - Epic Developer Community Forums ), although I am unsure if there is any fix planned.

Also related:

https://www.reddit.com/r/unrealengine/comments/4bz5lx/3d_hud_rendering_weird_when_character_moves_even/

Switching the Anti-aliasing method (in Project Settings) from Temporal AA to FXAA however fix this problem.