Official Unity Experimental HDRP DXR

Apologies for spam, but I had to do a quick & dirty proof of concept about how it looks like in movement. A pinball might be a really good showcase for rtx when you add lots of flashing lights & reflections. I'll most certainly follow that when the preview build arrives in October

 

Even though it isnt ready yet, I like to watch some of the progress towards this.

I see there were several things in 19.3 alpha 10:

Graphics: Add Ray Tracing Shader object, API, importer, and documentation
Graphics: added API for raytracing acceleration structure

I dont know why features like these sometimes show up in fixes section of release notes instead of improvements!

Anyway even though it does not work yet, I like to try with 7.x branch of HDRP anyway, just to see some small parts that work. I really like the DXR stuff in the HDRPWizard that helps get all the settings right to enable Raytracing.

Will DXR-specific stuff be staying in experimental namespace for 19.3? I ask because I got errors with RayTracingAccelerationStructure in HDRaytracingManager.cs unless I added using UnityEngine.Experimental.Rendering to that file.

Anyway thats the end of my talking about this for now, because there are other major things still missing from released 2019.3 alphas that mean there is no point me trying to get any further (eg missing CommandBuffer stuff at the moment).

Thanks as always to all those involved in this endeavour!

 

I tried something different using the Giger asset. I have to admit it adds the certain something which makes it look better compared to non DXR view.




The difference would be better visible with a slideable separator where you can compare the before and after images. It's most notable at the bottom and makes the scene look "correcter".

 

Last ones

 

Why is RTX not supported for the Standard-Pipeline and only HDRP?

When and will RTX support be added to Standard-Pipeline?

 

I dont think there are any plans at all to make it work with the standard pipeline.

I could be wrong, but this has always been my understanding of the situation. The old built in standard renderer will stay around for ages, but it wont get shiny new features like this.

 

That s cool because his art benefits from from tiny sharp reflections at the right place.)

He raytraced it in bis head and brought it canvas with an airbrush with his unbelievable free hand technique without paper masks. The highlights he scratched in with a scalpell or with an rubber by removing paint. So it s often the white canvas.

I started with Airbrush too before first Amiga and SGI arrived. But never got it managed in my head nor without masking like this guy.








Here the first human raytracer when it comes to light distribution and correct color toning depending on light distribution. Think he pretty could think in linear colorspace.
There are some strange findings in the video.
Most impressive is the color toning from wall paint from left window to complete right . They are correct tonings and the color has varriation over the complete color palette to visualize perfect light distribution in the room. Worth a look.
His output around 1668 is much more correct than PLM today by delivering similar speed.

There is also some kind of lightfield averaging and light caching.
He needed several months to finish.
Think around 8 for this one. So by moving sun and seasons the painting shows pretty correct a day snapshot but he slightly changed some shadows or reflections e.g in the mirror for composition purposes.

Worth a look.

http://www.openculture.com/2013/08/...ohannes-vermeer-narrated-by-meryl-streep.html

And here Tim who spent several years of his life to find an plausibl explanation through rerendering, rebuilding and repainting the complete thing.
https://boingboing.net/2014/06/10/vermeers-paintings-might-be.html



Hope i went not so far off. Both early raytracing. PBR style. )

 

Do you have plans to expose RTX API without HDRP? I see the potential for developers to write cross-platform path tracers or runtime light mappers.

 

I had quite a lot of fun with alpha11 yesterday. I was just messing around seeing what stuff from various different HDRP branches I could get working with it. Some HDRP RTX/DXR stuff does work if I fiddle around a bit. I've seen raytraced AO working, reflections working, some indirect lighting working in HDRP debug output (I didnt get it to contribute to main output yet) and I even got the pathtracing from branch HDRP/staging_pt working with this alpha (by paying attention to console errors and then hacking a couple of XR files from that branch to get rid of errors).

I dont think this is the right time for lots of people to be trying to get the HDRP stuff working with main 2019.3 alphas, since its still in development and the old custom editor build/project template thing from earlier this year provides a more 'complete' early implementation, albeit not the same as the one that will be in main HDRP. But some parts are certainly there if the adventurous want to fiddle around with it, or for people that are going to write their own raytracing stuff.

Cheers

edit - oops I kept saying beta when I meant to say alpha.

 

I've also spent a few hours playing with it. Managed to get raytraced ao & reflections to work in the scene view, however, they seem to break in play mode. (weird offsets, etc)

Raytraced shadows/gi/recursive rendering don't seem to be doing anything at the moment.

Can't wait to see where this is going, I use the experimental DXR editor pretty much every day, cool stuff.

 

RDNA Shader Instruction Set:
https://gpuopen.com/rdna-shader-instruction-set-architecture-document-now-available/

Does Unity needs to add support for AMD shader type or does AMD need to create library for DXR within their drivers?
How does this go?

 

Hello all.
can any one tell me how a gtx 1660 / 1660 ti is working with dxr ? cuz am upgrading from 1050 ti soon.

 

I can tell you that the 1080 ti works with it. But performance is horrible. Better upgrade to a dedicated card if you want to step into dxr.

 

Have u seen any test with rtx 2060 ? cuz this card is about same price as 1660 ti

 

What you see above from me is from a laptop with a 2060 mobile. I guess the desktop version is a tad faster. I considered it slow nontheless. But please keep in mind that Unity only released an experimental version so far. I rather suggest that you start DXR earliest in October when Unity releases the first alphas/betas.

 

@sendspace If you by any means can afford 2060 Super, go for it, it's way better card than 2060 or 1660 TI and it has decent perf all around, including DXR.

 

Do you have an approximate ETA on this?

 

Does DXR API work on GTX 10XX series cards? Nvidia released drivers with DXR support for older cards, but SystemInfo.supportsRayTracing returns false on GTX 1070.

 

when will we be able to download the 2019.3a12 with DXR support in it?

 

Yes, it works.
I've tested it on the Experimental build and I use a GTX 1080

 

https://unity3d.com/unity/alpha/2019.3.0a12

latest github master for HDRP works with a12, no idea about DXR yet

 

I'm using 2019.3.0a12 with HDRP 7.0.1 and I am getting this error:

This happens when I try to add global illumination to my HDRPDefaultSettings. For context, I'm using DX12 on a gtx 1080 ti with a project created with the HDRP template.

EDIT: Okay screen space reflections are disabled too and the SSR option is greyed out. This is probably a bigger issue than just raytracing...

 

Did you use the HDRP wizard to switch on all the right settings for DXR?

 

HAHA! Wow that was easy! It fixed it, thanks!

 

Unity why can't we have this working in the Standard Pipeline??? Take a look at Unreal Engines Implementation!

 

Okay, so I'm having an issue with the global illumination option. I have a ray-tracing volume or whatever with everything defaulted and enabled, and I also have global illumination enabled in my scene. My fps drastically tanks from 200~ to 30 when I enable global illumination, but no visual change appears...

Any help is greatly appreciated!!

EDIT: I should also add that ray-traced AO seems to be the only option that visually changes the scene. Everything else just tanks frame-rate without visual results. I also have the latest Nvidia drivers for my 1080 ti (431.60).

 

You talk about this experimental DXR editor now or the 2019.3 alphas with 7.x HDRP? if latter, it's not really working at all at this point yet.

 

Because the standard pipeline is basically what UE3 would be.... not UE4, it's a different engine. Epic would not be supporting their old engine either.................

 

At least there is no continuity between ue3 and ue4 so there is no confusion?

Here we go unreal vs unity implementation is the point godwin of this forum.

 

Then it's up to us to explain why, and I did.

 

Hi, im struggling to get the ray tracing working with 2019.3.0a12 and 7.0.1 . I did the Wizard (does VR really need to be enabled?), created a Raytracing Environment in the SampleScene and set every option i could find to ray trace. But shadows still wont use raytracing and objects with their materials render pass set to Raytracing become invisible. Any tipps?

 

I dont know anyone who has got that working, and I'm not sure if its supposed to work for us yet. I look at the sort of DXR development that has gone on in recent days on github, and it makes me think that more stuff is already working for them, but perhaps thats because they have newer editor alphas than us.

The same sort of experience happens regardless of whether using HDRP 7.0.1 or one of the much newer branches on github.

 

You dont have to touch the VR section to use the DXR section of the wizard. And in later version of HDRP they have changed the wizard interface, so there are 3 tabs instead, one for HDRP, one for HDRP+VR, one for HDRP+DXR

 

To give one example, there has been work to start to make different raytracing features with with VR. And some of this stuff is stuff that nobody in this thread has said they were able to get working yet in non-VR scenario (eg shadows).

Hopefully its clear why I am posting these thoughts. Its because I'm not sure whether these things arent working for us because of editor version we have, or because we are missing a step, or because the code in various recent dev branches (and master) on github isnt working in these regards yet.

I've confused myself by messing with too many different things and versions, but if I remember properly I can see signs of AO sort of working, and I have got reflections working in a test scene. But shadows are proving elusive, even when all the right options for them seem to be switched on. Same for other features I havent explicitly mentioned here, I dont see much sign of them working and I ran out of things to try other than to wait, and to ask.

 

Thanks @elbows

 

Siggraph presentation with some API documentation:

https://on-demand.gputechconf.com/s...started-with-directx-ray-tracing-in-unity.pdf

 

"Unity 2019.3b1+" What? Where do I download that?

 

Excellent, thanks.

So the bit from that presentation that I was previously missing, which get stuff working is:

• Find ShaderConfig.hlsl in your local copy of the high-definition-config package, and change #define SHADEROPTIONS_RAYTRACING to (1)

 

Can confirm "SHADEROPTIONS_RAYTRACING" fixes it. But 2019.3a12 crashes when I hit play ... Guess I'll just wait for 2019.3b1 lol

 

It doesn't crash for me.
I'm running it on a 1080 and not an RTX card

 

Does that toggle really fix things for you? I stumbled to this yesterday as well and tried it but I still couldn't make raytraced reflections to do anything right (just get black materials with it enabled), and main scene still goes to green and pink on my end when you run it

I guess I'll try in a new test project and see if it helps.

 

When I try again later today, I will use the HDRP/Staging branch on github, because the following pull request went through for that branch:

Implementing the dithered sampling method by Heitz et al.

https://github.com/Unity-Technologies/ScriptableRenderPipeline/pull/4371

 

I got something happening now when trying this on brand new project (a12, latest staging and that hlsl RT define set to 1). It still doesn't work properly but at least the reflections do reflect things outside the scene now.

 

There's something funky about the RT reflections exposure levels, had to dial exposure a lot to actually see the reflections are there:


Same with just SSR and exposure at more sane level:


But if I dial down directional light intensity to 10 (old Unity setup), I can ditch the exposure control and get this with RT reflections:


EDIT: This is now fixed on HDRP/staging. Thanks for the quick fix

 

Where can I find ShaderConfig.hlsl ? It doesn't exists in my project folder/subfolders and \Program Files\Unity 2019.3.0a12\Editor\

I installed 2019.3a12 that contains 7.0.1 . I did the Wizard, added the Raytracing Environment, but it contains the set of check box only. How can I download/add the Raytracing Sample Scene from the DXR experimental version?

 

@OnlyVR like the message said, it's in the high-definition-config package, you have to manually modify the existing package (move it from library/package cache to your packages -folder and edit that file there).

 

I love watching the fixes and improvements happen.

There is a pull request for directional light shadow fixes today, which hasnt gone through yet at the time of me writing this. And another one from a few days ago with UI improvements. An alpha cutoff fix was merged last week too.