Bug New HDRP features vs XR

Hi, nearly all new HDRP features don't render correctly in XR; I have tried

- Water (Refraction seems very off)
- Lens Flare (rendered double)
- High Quality Line Rendering (rendered double in very weird way, reported as IN-34815)

As HDRP officially is supposed to work with XR, and HDRP is also being used by active live XR projects, it would be very helpful and necessary if a XR setup would be part of the QA process.

 

I would also love to see better automated testing coverage for this.

 

Found another one: TAA Post Sharpen does not work with XR (reported as IN-35230).
Also I reported Water refraction and lens flare issues with IN-35147.

It's not like I am searching for bugs, just simply trying out the latest beta with XR....

 

Yes, I have had exactly the same experience. Like I mentioned in Discord a while ago, I think XR support for these features gets added (and looking at the code, it all seems proper at first glance), but does not get properly tested and automated testing coverage is currently lacking in this area.

So right now we have the following list:

- Water refraction (IN-35147)
- Lens flare (IN-35147)
- High Quality Line Rendering (IN-34815)
- TAA Post Sharpen (IN-35230)
- Ray Tracing (IN-29319)
- DLSS (IN-29324, RTX 30 series specific)

These features simply did not work correctly when enabled with default settings. I'm afraid there is even more if we dig into it.

The fact that these seem like they could (and should) have easily been caught before landing in the engine, combined with the current iteration times (2-3 months?), can cost a lot of unnecessary time and frustration.

@chap-unity is there anything that can be discussed internally on how HDRP could start improving in this area?

Thanks a lot.

 

"High Quality Line Rendering" in XR was accepted by QA, feel free to vote (this is needed e.g. for hair shader):
https://issuetracker.unity3d.com/is...en-the-high-quality-line-rendering-is-enabled

 

Water refraction and lens flare bug report has also been accepted by QA:
https://issuetracker.unity3d.com/is...the-hdrp-asset-and-lens-flares-are-duplicated

 

DLSS (IN-29324, RTX 30 series specific) has been fixed in 2023.2.0a6+

 

TAA Post Sharpen issue in XR also accepted:

https://issuetracker.unity3d.com/is...e-pass-instanced-and-taa-post-sharpen-is-used

 

And found another one, which seems a regression: SSGI does not work anymore in XR (the denoiser is doing weird stuff, not updating correctly with camera rotation). This worked in earlier LTS versions of 2021.3, but at least with 2021.3.18 it's broken. Will do another bug report as soon as I find time.
Edit: Was my fault, I accidentally disabled motion vectors on camera.

 

@chap-unity Are there any info about if and when these issues will be fixed? So far I only see the issues in the issue tracker, but no activity; and only the High Quality Line Renderer one has an "under consideration" tag.
We are relying on XR / HDRP, and especially the broken High Quality Line Rendering and Water Refraction are highly important for the future of our product, and there are no alternatives (at least in the Unity universe).

 

Thanks for the info, and we'll try to be patient for a while

 

Just tried the fix for High Quality Lines in VR (https://issuetracker.unity3d.com/is...en-the-high-quality-line-rendering-is-enabled). While in principal it works, the fix completely misses the point: It falls back to multi pass, which of course has severe impact on performance (see this commit comment: https://github.com/Unity-Technologi...mits/e41ac1117319d2780f4a8906fa2f0675cedc0ba9 which basically says to do single instance rendering is too much work....)
It runs way too slow to be usable in VR, which was the whole point of the issue. It even runs slower compared to run everything in multi-pass.

That's very disappointing.

While this was a beta, I also noticed that VR rendering in general has some regressions I'll do a new bug report about.