Saving a screenshot with Oculus XR + Vulkan only saves a partial screenshot

[ComeOnAndSam]

So I have a scene where I save a screenshot I take with a different camera in the scene, and then save it to my Quest device.

However, it’s always between 1/5th and 1/2 of the screenshot that’s shown, the rest is blank. If I turn Oculus XR off, build the same scene and save to the same place, it’s a full picture.

I’ve been unable to figure out a cause for this. If I view the screenshot in scene, it’s fine, but when saved it’s mostly missing. Is there a way to get this to work?

[DevDunk]

Which unity version?
Which Oculus XR version?
Just on Oculus XR or also OpenXR?

[ComeOnAndSam]

@DevDunk

Which unity version?
Which Oculus XR version?
Just on Oculus XR or also OpenXR?

Unity 2022.2.0f1

Oculus XR plugin 3.2.3

I’m not using OpenXR, just Oculus XR

I’ve found that this issue is specific to graphics API being set to Vulkan, it does not happen on OpenGL, but I need it to work on Vulkan.

[ComeOnAndSam]

I did finally find someone else reporting this issue

Unable to get correct pixels from RenderTexture in Vulkan

2021.3 LTS (all versions), Quest 2, Vulkan (tested with/without URP) Made an empty project, added a new camera with a RenderTexture, and tried to save it to disk. Either get a completely black image or an image with a black line as attached below. The image sometimes shows completely black and sometimes as below randomly, with the black area changing in size. Code is simple and straightforward, and I have tried multiple ways, heres an example of the current one: async void RunReadPixel…

Unity apparently claimed this is a bug they fixed less than a year ago, but I’m in a newer unity version and the same issue persists.

[DevDunk]

I suggest making a bug report from your unity version. Also link this thread for more info.
You can try to see if this happens in the latest 2021.3 version. Performance is a lot better there as well