Official Unity Experimental HDRP DXR

2021.1.0a9
Finally you got it. Best version of Unity DXR so far!
Background GI and direct light works as should do!

 

Do you start with the 3D template or the HDRP template?
...and then from there enable all the raytracing?

I find that ANY project I start from either 3D or HDRP template, with 2021.1.0a8 or 2021.1.0a9 immediately starts with error before I even get into the project the 1st time:



WHen the project then eventually starts, I dont see any compilation errors. Its only when I try enabling raytracing features when the errors start

 

newguy123 I have my own HDRP core since many months. I do not start new template (waste time) I just copy/paste project (whole Unity folder) and after that open and wipe all stuff which I do not need: objects and textures.

 

This Ampere 3090 is Amazing with new Unity. Very complex scene, 4K textures, QHD animation resolution.Got 2 FPS/sec in Pure DXR High Quality render!

 

Can we see a screenshot?
What do you consider a very complex scene?

 

newguy123 I can not show you any of renders (confident policy about design)
Also this is not commercial project (this is my side test of the my actual project - to see on what stage is Unity with DXR)
Size of project: medium, typical standard but complex in details. Lightwave and Rhino objects. No Bake, no UV Light Maps (only my UV maps), 4K textures.

One more important thing: 2 bounce lights. With new Ampere I stopped using 1 bounce light...is completely senseless for Interior renders.

 

Does anyone here know if there is a roadmap for enabling raytracing in VR? or possibly a current method for doing so? I'm aware that performance would likely be poor, but still would like to start working on it with hopes that software optimization and future hardware could make it run smoothly.

 

HDRP supports VR, even DXR in VR. It's just Unity's current VR solution doesn't, which is frankly silly. Basically before the new Unity XR system, DXR still worked in VR, now the new thing is limited to DX11 on Windows and we'd need DX12. There's not been any official response on this so no idea if Unity is going to resolve this. See this thread: https://forum.unity.com/threads/dxr-in-virtual-reality-possible-or-not.992183/

 

Great, thanks! So do you think that using the "legacy" VR system with an older version of Unity would be a viable solution for now?

 

There's no good option today. Basically best you could get would be to use the last 2020.1 version that still supported the old style VR and try to hack in the newest HDRP that you could.

But DXR and DX12 has gotten improvements on newer HDRP and Unity versions so just going back to say, 2019.4 and HDRP 7 will not give you that great results and you can't use the latest improvements because current Unity versions don't support DX12 on VR..

 

How is performance with DX12? For a good while, just enabling DX12 tanked the fps massively ... is that basically fixed now (meaning, is this becoming a viable option to have toggled on/off in settings)?

 

It has improved but there's still a pretty big performance hit compared to DX11. Makes me think what Vulkan ray tracing could mean for Unity. Nvidia driver 460.89 with support for Quake II RTX + Vulkan ray tracing released a couple of minutes ago. Maybe there's someone on the team who could hack together an experimental editor build in their sparetime?

 

If the RT implementation has been hardcoded for the DirectX API since the beginning then it is unlikely a sparetime-made hack could port it to Vulkan this easily

 

Trying out a horror scene:

2020.2 - This is all RT shadows, and some reflections. GI works well. However I have yet to get emissive materials casting their own light/shadows. The light at the top is emissive, but no matter how bright I make it it will not cast any light.

 

copperrobot - emissive lighting is very weak, you can see it working only at very specific Exposure values (for "Fixed" exposure mode it's "-3") and "Clamp" parameter (that limits brightness of emissive/bounced light) in ray traced GI settings is set to "4" or more. General rule - emissive lights can be used for scene lighting purposes but only if emissive surface is huge (at least square meter or better 5+ m2). Also with single bounce GI mode emissive lighting won't have light bounces because it's implemented like reflected light itself.

But it's free (no additional cost to GI) and casts smooth area shadows (also free). Dealing with noise is a challenge, though - it's tricky to balance Clamp, GI distance and Exposure parameters to work together...

 

Ah sure, well I guess I could expand it further. Would just be nice to be able to have some self illuminated objects that cast their own light. Hopefully that's a feature on it's way.

 

Bright enough emissive surfaces produces tons of fireflies/hot pixels and even in offline rendering denosiers those are unsolved problem, hard to expect that real time > 5ms per frame denoisers can deal with that (maybe with NN magic but definitely not on math-based accumulation + blurring solutions). Hope I'm wrong here...

 

Strangely an older scene I worked on was fine with emissive:

This was a year ago, without any crazy issues and running in realtime. Very simple of course, and the glow does take a while to go away. It's just a shame it's not really worked since.

 

Emissive surfaces working, but only when they're large enough - this way low-intensity light is produced from large surface and can actually lit something around while it's low intensity allows denoiser do it's job. But for small high-intensive sources - like lamps from post above - it's not an option, and with distance like 50m and more noise becomes a problem - denosier has "quality cascades" and distant ones are not good enough to kill hot pixels - large bright spots will be all around....

 

Well, hopefully they figure it out, in the meantime I guess lighting can fake most of it.

 

I have a question about the metal reflection. Does anyone know the ray tracing can only reflect the direction light? I found some color is totally black on the bottle. Normally , it should be orange. I'm not sure is there any other settings can avoid this

 

Ray traced reflections simply not reflecting other ray tracing effects - GI, AO, shadows (rasterized shadows used instead). So, they're fast enough but often looks cheap as hell. If you're using procedural skybox - try to increase brightness and orange tint in ground settings to make those dark spots go away, but after that every reflection will be bright and orange (even in completely dark place).

 

*maybe it's already noticed, but just in case*
In latest branches (10.x.x release, 12.x master) ray tracing GI in quality mode completely broken (every object affected by GI turns super bright). Maybe this related with propagation of this bugfix into those branches...

Bugreported (Case 1307454).

 

Hi @auzaiffe ,

Thanks for your work as always. I am currently trying to improve DXR performance by using a custom acceleration structure manager that makes use of caching, culling and async tasks to update on demand, to completely eliminate any CPU overhead that comes with DXR, to bring DXR to 144hz/VR.

I have tried optimizing the RTR/RTGI upscaling before and a few weeks ago I noticed your work in PR #2798 which changes the denoising strategy for ray traced reflections by removing the upscaling function.

I have compared the performance difference before and after this change.

Commit c658c22f48c4861cd4ae655d92d6c883c9451f01 (before) : 78 fps (12.8ms)
Commit 0cf69b68b41d8a67a3b6fae549d73d1d53b11833 (after) : 88 fps (11.3 ms)

This is a massive performance increase for RTR, and I wonder if we could achieve the same with RTGI, but keeping the upscaling option available as optional.

This could lead to another massive performance increase for most situations (possibly even hit 100fps in my example scene?), but we would still be able to toggle the upscaling function in edge cases where it's necessary (cinematics, low light).

 

I know silence is better than bullshit, but, WOW!

 

I'm getting lost in all the acronyms

RTR = Raytrace Reflections
RTGI - Raytrace GI

Is that correct?

 

I'm trying to use latest branches with needed fixes but there is some kind of PS5 related error:

Code (CSharp):

1. Exception: Compute Shader compilation error on platform 25 in file D:/U - TEST 2/HDRP_GitHub/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl:165: Couldn't open include file 'Packages/com.unity.render-pipelines.ps5/ShaderLibrary/API/PSSL.hlsl'.
2. HDRP will not run until the error is fixed.
3.  

Tested with latest master & 10.3 branches - no luck, same problem. I did wait for a couple of days but seems this is still not addressed for some reason - does anybody know how to surpass this (or should I just wait)? Is there something new to import procedures or this "com.unity.render-pipelines.ps5" thing is simply missing? How I do it:


Thanks in advance!

 

All version 12 of anything Render Pipeline related is for Unity 2021.2 alpha. You will be getting errors since the alpha isn't out yet.

 

I thought so, but with Unity 2020.2 + HDRP 10.3 it's the same. Nevermind, I've managed to copypaste bugfix codes from GitHub and put those in to last PS5-free HDRP branch (2021 staging) - seems to be working fine, VRAM not leaking and new clamping for performance mode is really better handling color value (thanks to auzaiffe!).

 

Shall support for PS5 platform added in v12 backport in v10+?

 

Some shots from my new interior (WiP):

 

Unity added DLSS card to "under consideration" section on HDRP Product Board:
https://portal.productboard.com/uni.../196-nvidia-dlss-deep-learning-super-sampling

 

Update:

 

I watched last night's NVidia Unity Raytracing Webinar and thoroughly enjoyed it @pierred_unity

However, I think I missed the bit about having the scene view and game view with different settings.

I'm not making an app, but will be using raytracing for high quality visualisation. I will be using Unity Recorder in conjunction with cinamachine, to offline render 4K image sequences.

My scene is HUGE, and I mean HUMONGOUS. Ideally I will be working in scene view to arrange things, but it gets slow very quicly navigating. How can I get the scene view to use low quality or minimal settings, while keeping the Gamne View High quality?

Ideally I will have only 1 view visible at a time. That way I can work in scene view and only use game view to quickly see if things look ok, so the game view is ready for Unity Recorder.

Makes sense?

 

Thanks @chap-unity that info helps.

Is there also some kind of half resolution and quarter resolution setting somewhere that I can flip between working on the scene and between outputting the final offline frames?

I'm expecting my viewport to come to an abrupt crawl while working as I will be setting up a HUGE scene with thousands of high poly objects and plenty 4K textures.

Typically we need to output high quality still images at 6000 X 4000 and animation sequances at 4K. I'm pushing the limits straight out the gate to see if we can make the switch from traditional DCC offline rendering to Unity.

 

I recommend creating two HDRP assets, one for editing and one for rendering.

 

Update:

 

hey guys how's it going?
I am looking for the DDGI script from this video, is that a feature, that I can access from the SmallOfficeRayTracing repo, or from anywhere else?
thanks

 

Buildmark is finally released on Steam (Early Access) - meh, two months ago I wrote "almost ready"... that joke about "when you feel that your project is finished on 90% there are actually another 90% of work ahead till release" - it's not a joke, never has been! XD

Now there is an official forum thread for future updates but I still post here best screenshots with ray tracing .

 

I'm still having issues getting rid of those 2 warnings, despite having everything checked in all assets and quality levels. Tried with Both 10.2.2 and also 11.0

 

What you enabled is the frame settings. So that's telling HDRP to render those effects to the camera. You didn't actually enable those settings yet for the renderer. That will be under the HDRP tab under Quality. Select HDRP then choose the pipeline asset in use to the right and then you will see those effects in the list to enable. As well as all the other HDRP rendering settings.

 

Its already enabled there also. Still doesnt go away