Official Unity Experimental HDRP DXR

Thanks for the info

From a tech support point of view (just going by what some people say on these forums), quite a lot of people are missing the ShaderConfig macro validation step, or dont understand how to make a local copy of the hd config package so that the changes to that file stay.

Is there any clever way you can make the DXR wizard give a warning if the SHADEROPTIONS_RAYTRACING macro isnt set correctly?

And an easy link to proper official instructions for copying hd config package to a local location would be good, I make a bit of a long mess when I try to explain ways to do this, any my way might not be best way.

examples:

https://forum.unity.com/threads/hdrp-ray-traced-shadows.749228/

https://forum.unity.com/threads/hdrp-dxr-shadows-and-global-illumination-not-working.751280/

 

"- Preview DXR in 2019.3 don't support deformer (skin, vertex animation)"

When will Unity support skin deformation with raytracing? (RTAO, RTGI, RTshadows)?
I'm testing raytracing ao, shadows, gi with characters in UE4,and it's really looking great.. I hope unity can
do the same soon..

 

It has disappeared. Maybe the 2019.3 beta HDRP supports ray tracing.

 

See above:

 

I know performance is supposed to be bad, but like, can we at least fix the extremely dumb stuff, like spending 50 ms calling GetComponent()?

 

found the culprit in BuildSubSceneStructure.
comment out these lines to get 30 ms back, assuming you're not using reflection probes.

 

Shouldn't the Turing 1600 series be compatible with ray tracing too?
The documentation only seems to mention the rtx and pascal series, while the 1650/1660 were also adressed with the driver update

 

is it me or there is no Stack lit shader in HDRP right now??
https://docs.unity3d.com/Packages/c...tion@7.1/manual/HDRP-Features.html?q=StackLit

 

The StackLit Shader is available through Shader Graph

 

Please some info about this "bug/feature". Hope there is no hidden technical reason to use only LOD0 of the model for ray tracing (low-poly proxy objects can soften the blow here, but it will be good to know if there is a need for them or it will be fixed in 2019.3 release or whatever).

 

It will be very good to get so many of mine milliseconds back but it seems not helping in my case (I've found those two strings in HDRaytracingManager.cs file and commented them but still have clumsy 20fps while editing in Scene view/Play mode with ray-traced GI + reflections). Unity 2019.3b5 + DXR 7.1.1

Upd: O, it's working. Thanks!

 

Regarding Skin mesh renderers, I found a bit of a hacky workaround. I had a character I wanted to be reflected in puddles, but of course it doesn't show. But knowing non-skin meshes do I chopped up the character into parts and parented them to the rig in the same place.

The good part is that while placing those objects in their own layer and camera-culling it means they don't appear on camera (thus avoiding obvious and ugly clipping), they DO still appear in reflections. In most reflections it will be indistinct enough to avoid anything being noticed.

 

I've updated "Real Materials vol.0 ray traced" scene to v1.1, now there is a whole project packed, no need for the struggle with quest "how to enable ray tracing" only thing you need is Unity 2019.3b5.

Visuals are the same, but in terms of performance it's a day and nigh - so that is a experience to share:
0)Using Tier1 gives 2x performance boost over Tier2. Thanks to Unity DXR team to have an option here to choose )
1)I've created a layer named "RTPROXIES" for low-poly version of scene meshes.

2)The idea is to set ray tracing work inside it's own low-poly version of the scene (until a proper support for LODs will arrive) and then apply GI/reflections/etc over hi-poly geometry on "Default" layer (deferred lighting magic...). So, using this "RTPROXIES" low-poly layer for ray tracing (via "Ray tracing environment") I've got this performance boost - from 13.9fps to 40fps!:

3)This was possible not only because of low-poly layer usage but also thanks to
Pyromuffin's discovery about reflection probes. Here is the example with reflection probes hidden (40 fps) and displayed (26fps):

(It's enough to hide them in scene it seems, no need to comment code).
Upd: this was fixed on Unity side in HDRP 7.1.2+ - no need to switch off reflection probes anymore.

 

4)And some more essential settings to receive those 40 fps with ray traced GI and reflections enabled simultaneously - new option "Deferred mode" gives huge performance boost and it's necessary to enable it:

"Rays binning", though, instead of rising fps does opposite (minus 4 fps). And be very careful with smoothness of ray-traced reflections (and reflection settings in general), it can drop fps from 40 to 10 very easily no matter how optimized everything else.
--------------------------------------------------------------------------------------------------------------------------

Currently there is a problem with distant GI (it produces quite ugly dark spots on clean geometry and there is no control other this - even if I have fps to spare on that now, there is no option to tweak , it looks extra horrible when you move camera through those white objects X_X):


Second concern is amount of VRAM - this simple scene eats around 9GB and probably will slow down or even crash on RTX 2080/2070 videocards with 8GB on board VRAM, 2080Ti barely holding...

But things goes better with each beta! Hope this info was helpful, have fun with ray tracing ).

 

Great results.

 

I still don't get raytraced shadows. no matter what I do.. RTGI and RTAO works fine. maybe it's my windows.

 

Directional light - ray traced shadows works fine from it (should be enabled in Directional light properties).
Point & spot lights - no ray traced shadows options at all, not working.
Area lights (rectangular) - ray traced shadows options are there and they works, but only if there is a Directional light in the scene with ray traced shadows enabled in his properties and intensity (in Lumens) of this Directional light are not 0 (if 0 there will be mad flickering of ray traced shadows from area lights). Weird behaviour, reported about those as bugs (Case 1188932 and 1188935).

 

Work on these has already been done, but I forgot what branches on github they ended up in. Perhaps the 'not yet finished' HDRP 7.2.0 which can be found in branch release/2019.3.

As for shadows not working for some people, most likely explanation is failure to make sure screen space shadows is enabled in both HDRP asset and also via camera 'Custom Frame Settings' (or instead of Custom Frame Settings on camera, HDRP quality/default settings which I dont have experience of, never got it working for this purpose).

 

Those are all checked.. but I do get this error on the Console:

Please fix all the compilation errors for Ray Tracing Shader "RaytracingShadow"!

I read somewhere that is has to do with some Non ansci? character errors on some files (BSDF and some other I forgot)

 

Whoops :/, it seems that all that time I was working on that old 7.1.1 DXR build from month ago (that installed manually in Packages folder) and it's not updating automatically with Unity 2019.3b5 (how did I get those new options like rays binning and so on?)... Now testing area lights - they working fine without Directional light, point & spot light have ray traced properties for ray traced shadows and they are also working fine. Thanks for notice!

Btw, after I cleaned up packages folder from remains of 7.1.1 now every time close editor this SHADEROPTIONS_RAYTRACING = 1 (from Packages > High Definition RP Config > Runtime > ShaderConfig.cs.hlsl) resets to 0 and this is probably the case for people who can't get ray tracing to work...

 

They made some of these config files live in their own package, so that you can copy that hd config package to local packages, without having to copy entire HDRP to local project location. Then when you edit the file the changes will stay.

In projects where Unity have done this, they usually create a LocalPackages folder within project folder, copy package files & folder to be inside LocalPackages folder, and then use file: references in manifest.json to include that package. But normally I do it a more lazy way, I just remove reference to package from manifest.json, and manually copy package folders into existing Package folder in project. It sounds like this is what you were doing with an earlier HDRP dev version. But this time you only need to do it for com.unity.render-pipelines.high-definition-config, you can leave the main hdrp package alone.

 

If what I said there isnt clear, note that Unity do the LocalPackage thing in the SmallOfficeRayTracing project now:

https://github.com/Unity-Technologies/SmallOfficeRayTracing

Note the LocalPackages/com.unity-render-pipelines.high-definition-config folder.

And the Packages/manifest.json file, where main HDRP package dependency is referenced in the usual package manager way:

"com.unity.render-pipelines.high-definition": "7.1.2",

But config package is referencing the local copy:

"com.unity.render-pipelines.high-definition-config": "file:../LocalPackages/com.unity.render-pipelines.high-definition-config",

https://github.com/Unity-Technologies/SmallOfficeRayTracing/blob/master/Packages/manifest.json

 

Also, for people not happy manually editing manifest.json file, if you want a local package that lives somewhere other than Packages folder, can probably do it using the plus button menu at top left of package manager with option 'Add package from disk'. But I havent actually tried doing it that way so I keep forgetting to include it in my attempts to explain solutions for this.

 

Here is the fixed "Real Materials vol.0 ray traced" scene v1.2 (HDRP v7.1.2) - latest HDRP solves VRAM problem (now about 5-6GB needed) + reflection probes also not affecting performance when enabled + a couple fps more + no random crashes. Sweet!

 

Has anyone tried running this in the cloud? AWS or otherwise


(In reference to streaming RTX over WebRTC )

 

Hi

This is my first scene with DXR and i've experimented problem with SHADER.



This is the result with shader HDRP/lit > Rendering Pass > Default



But if i set Rendering Pass to Raytracing model disappear



Anyone ..... know why??

 

Great stuff. Thanks.
According to your demo i created an RTPROXIE for an Car interior and for the ground. Gives me solid 45fps on an Titan RTX. Are there any tips for moving the car?

 

When writing the emission channel from shader graph, the GI contribution for the object isn't used. A work around is to use an emissive map texture, but it's still inconvenient

 

How exactly do I open the new DXR project "SmallOfficeRayTracing" ? I've tried doing everything as written in the instruction but I'm getting errors: https://github.com/Unity-Technologies/SmallOfficeRayTracing/issues/2

 

I don't have enough experience with animated stuff and ray traced rendering but all should work fine if it is not skinned mesh and proxy objects animation matches that on the original meshes.

 

Hi Seb

Excuse me for my intrusion, but i 'm in confusion with shader. The standard HDRP/lit in RenderingPass option
need to be set Raytracing only for transparency? or it need to be set for every type of rendering?
When i set to Raytracing model disappear, but editor setting for DXR raytracing are correct ......

 

aah. ok. i cannot wrap my head around completly what calculations are done via the proxys and what calculations work with lod 0 or high detail geometry.

 

Those errors are caused by entries in Packages/manifest.json that were expecting you to have a manually copied version of HDRP etc packages in a SRP folder. This has already been changed, so you must be using an older version - try cloning the repository again.

Here is what I mean, the current manifest.json file doesnt contain those entires anymore, now it gets HDRP 7.1.2 in the standard package manager way, and only uses a local package for HD config package, not the others.

https://github.com/Unity-Technologies/SmallOfficeRayTracing/blob/master/Packages/manifest.json

However there may also now be a mistake @SebLagarde in the LocalPackages/com.unity.render-pipelines.high-definition-config/package.json file. It is set to version 7.1.2 but the unity version is still set to 2020.1 (and release a03) instead of 2019.3 and 0b4.

https://github.com/Unity-Technologi...pipelines.high-definition-config/package.json

 

Hi Guys

Newbie question1, for raytracing to work, should my main monitor I use the editor on, be connected to may raytracing enabled card, or can that card be my secondary card without monitor connected? (I have a Gtx 670 as my primary and 1080Ti as my secondary)

Newbie question2, For raytracing, can 2 X RTX2080Ti's be used in SLI to double up the VRAM, or is SLI not supported currently?

 

Been working on a new scene with DXR. You can see the reflections in the puddles and on the cars. Spotlights sadly do not raytrace, but they work for the limited use case here. Going to make a fun little music video thing.

 

As a note, the astronaut is a skinned mesh renderer, which is not currently supported. However I placed mesh renderers of the different parts parented to the bones and then culled them from the camera so that they only appear in the reflections.

 

Is there any chance StackLit will be supported with DXR in the future?

 

Hi @SebLagarde.

Does DXR not support procedural mesh in Rendering pass - Raytracing yet?
Here is my result.All the objects is procedural mesh and updating vertices everyframe except the sphere.They all use the same material(Rendering pass - Raytracing) and MeshRenderer component.Only the sphere's rendering is correct.The others turn black and has some flickering.




When i change that to Rendering pass - Default,they works well.I'm using 2019.3.0b4 and has enabled recursive rendering~


This is the testing video. (https://twitter.com/i/status/1182324728851075074)

 

1. Since I linked my FB account to my unity account, the forum thought my username was already in use? I don't know if someone can fix this, I had to change it to get on, even though I was able to change it back to 'forbiddenera' in my unity account. Was frustrating as it said I wasn't logged in on the forum, I couldn't login, couldn't create new account, or even log out.. Eventually figured it out..

2. I've had a heck of a time getting any DXR stuff running decent in Unity yet and it's been discouraging. What is encouraging is some of the beautiful renders I've seen in this thread. I mostly got my RTX card (2060, 8-core (older) xeon, 32gb ram, mp3,1) for this; I started developing a racing game back in the early Unity4 days, got it running pretty decent on Unity but my hardware at the time couldn't keep up. Finally have some OK hardware so want to get it running again.

3. I guess I don't fully understand how projects are laid out in Unity anymore? I mean it seems obvious but..? I would think that creating a new HDRP project would create an empty project, maybe give me the option of loading/importing a sample scene but not load it right into my project..I guess it does seem to take care of a lot of stuff for you which is always nice, but, can I just maybe delete the scene stuff and save it as a 'clean' project? It would be odd to have any leftover 'sample/example' assets in your own project, no? Not to mention just starting a project results in an over 500 megabyte folder! My entire last test project was less than that and you were able to drive a car around a rather large track.

I've had numerous issues; all seemingly random and not always repeatable. One that is repeatable that has been mentioned in this thread already is the

ShaderConfig.cs.hlsl

#define SHADEROPTIONS_RAYTRACING (0)

getting reset all the time.

I've literally only been working with the sample scene so far, just trying to implement all the DXR stuff as listed in the docs.

The docs list a "Tier 3" ray tracing option, for some reason I only ever see Tier 1 and 2, there is no Tier 3. Docs say this is required for path tracing, but I had that working earlier on Tier 2? Last time I tried it, all I got was black scene.

I'm going to go through and try a few things while writing this post now and see what issues I run into. It's quite possible that some/many/maybe most or even all are user error, I haven't worked with Unity since 4 was new, my last project started on Unity3 and upgraded to 4 when it came out.

Even though I've started a bunch of projects and had issues with all of them I'm going to start a fresh one for this as I'm already having issues with the one that is open. (the #define had reset itself it seemed even though I didn't close/exit editor, now GI wont RT suddenly even though AO is working)

1. Unity Hub -> new 2019.3.0b6 High Definition RP project
2. Window -> Render Pipeline -> HD Render Pipline Wizard
--> HDRP shows issues with Asset Configuration and Diffusion Profile
--> HDRP + DXR shows those two, plus Auto Graphics API not supported, DX12 needed, Screen Space Shadow Required, DXR not activated, DXR Resources
--> Click FIX ALL..wait...Restart Editor..wait.....
3. Packages -> High Definition RP Config -> Runtime -> ShaderConfig.cs.hlsl -> Edit with MSVC -> Set

#define SHADEROPTIONS_RAYTRACING (1)

.. wait ...........................................................
4. HDRenderPipeline Asset Config -> Enable Realtime Raytracing, Tier2
5. Edit -> Project Settings -> Player -> Uncheck Static Batching
6. Edit -> Project Settings -> HDRP Default Settings -> Ray Tracing was already on
7. Sky & Fog Volume -> Add Component -> HD Raytracing Environment
8. Sky & Fog Volume -> Add Override -> Lighting -> Ambient Occlusion -> Override for RT on -> RT on -> Seems to work, adjust settings a bit..
9. Sky & Fog Volume -> Add Override -> Raytracing -> Global Illumination -> Override for RT on -> RT on -> seems to work this time as well..noisey though..turn on both denoisers and it's not so bad, seems to do more than cranking sample count.
10. Sky & Fog Volume -> Add Override -> Lighting -> Screen Space Reflection -> Override for RT on -> RT on -> no idea.. don't see a difference, nothing is really reflective in this scene.. Maybe I should add something / change a material, but first I want to continue through the list of things..
11. Directional Light -> Shadows -> Shadow Map -> Screen Space Shdows ON -> Ray Traced Shadows On
--> Contact shadows disappear on 'medium' or 'low' it seems..on 'high' they don't appear good at all..distored with lines and stuff..but I remembered where the settings for them were..turned up sample count, looks better..though I had to go all the way up to get it looking decent.
12. Starting to have issues. I pressed play, while the shadows look perfect in the static view, and in the scene view (though moving in the scene view looks weird because of the way the RT shadows fill in over the contact shadows..) it looked screwed while playing, the shadows change completely. Disabling RT shadows made them look 'normal' in play mode again. Re-enabling still looks wrong; disabling contact shadows shows almost no shadows in the scene at all when RT shadows is on, so RT shadows aren't showing up in the camera when playing. Though they show up when not playing. Actually.. some shadows do show up.., like from the paint bucket and table but not from the wall.
13. Sky & Fog Volume -> Add Override -> Path Tracing -> Enable -> blackness..press play->whiteness!! This did work before.. and I have never been able to select a Tier 3.. which I believe docs say is req'd. I press stop, the editor window does show some path tracing..for a bit..then goes black..
14. Let's restart the editor. Save. Restart. Still black..hmm too bad that worked before..? Oh, but my shader config #define is 0 again, woo. Set to 1. Path tracing still black. Scene looks darker than before. Unity Editor crashes....

Will continue in another, post, because I want to link this in my bugreport.

 

15. Restart Unity. Set shaderoptions_raytracing to 1, again. Unity actually responds by importing stuff this time (didn't last time)
16. Now I just get a grey editor screen. Only thing rendering is the XYZ doohicky (with or without path tracing). Camera is solid black. Pressing play changes nothing.
17. Check HD render pipeline wizard -> 'there are issues with the asset configuration', 'there is no diffusion profile' .. *fix all* .. no change.. still grey scene view / black camera.
18. Turn off RT options for AO, GI and SSR, forgot shadows. Save Project. Restart Unity. Scene appears normal in editor and camera with RT shadows.
19. Set shaderoptions AGAIN. Responds, imports.
20. Press Play, most rt shadows disappear. Stop, reappear. Actually, it seems like it's mainly just the shadow of the wall. The shadow of the table too. The hammer and other stuff on the table, paint bucket and construction light cast their shadows.
21. Lets try Recursive Rendering. Select floor material, select ray tracing. Disappears (expected). S&F Vol -> Add Override -> recursive rendering -> enable -> floor is now reflecting stuff and is raytraced. I press play and it turns grey. With wierd things rendered 'in the floor'

I've followed pretty much this exact same process on several different projects just trying to test this out with the example scene. I've had path tracing working. I've never seen tier 3. It seems like every time I start over with a new project, I get a different problem.