HUD solution in vr(HTC vive), and stereo layer

Now we meet a problem on HUD in vr (HTC vive), the hud didn’t show correctly, does somebody has a solution?
we notice that 4.12 4.13 Added stereo layer , anybody know how to use the stereo layer in 4.13?
we can’t find any document or tutorial for it.

thanks!

在4.14版本中已经可以正常使用stereo layer了。
stereo layer 作为摄像机的子节点,并将纹理设为UI即可。

请问能解释的更详细一些吗?

Try this: https://developer3.oculus.com/documentation/game-engines/latest/concepts/unreal-overlay/