Official Unity Experimental HDRP DXR

https://www.indiegogo.com/projects/the-unity-improver-nano-tech/coming_soon/x/27942859
O just registered

 

But does it work on raytracing?

I'm starting to lean more towards UE to be honest. For offline renders, it has everything you need built in, and it just works. No fiddling needed. No 20 different 3rd party plugins needed, that stop working each time Unity does an update, then takes 5 versions to be compatible again.

 

I stick with Unity because it is very well developed if we talk about DXR. Also, GUI is very friendly - reminds me Lightwave system. I think you do not need anything (third part plugins) to do offline renders in Arch department. I wait only for Terrain support and by this whole system will be complete. I do not need more

 

Yep, that may be true for a small interior residential archviz scene, but wait till you need to do a large scale exterior archviz animation...

 

I did already big interiors (still as tests, no commercial) - no problems at all..you can give me whatever.
I am about to finish the whole system for interiors after 2 years of digging (yes my company has a very difficult pipeline, quite unique and really complex - that's why took so long)
I start soon Exterior system - so soon you will see new renders from me
I know many things are better in Unreal (or I am wrong?) but I like Unity GUI and system and that's for me means a lot.
Remember that I use Lightwave 3D for 25 years - because I like it, more: I love it. You can call me a dinosaur (not so many people use Lightwave 3D) but The Power is from Skill not from software

 

good to see a Lightwave user

 

Did a test with ray-traced reflections and it turned out pretty well!

 

New 2022.2.0b2 Entries since 2022.2.0b1
Features

• HDRP: Added Ray Tracing Terrain support for HDRP.

Wooohooo!

 

however, it is not yet reflected in the Roadmap

 

Ah that sucks. We typically dont use terrain at all. All our "terrain" is just imported FBX meshes and we scatter/spawn our grass/trees/plants over the meshes.

Is there an ETA of when we can expect things like trees/grass to be fully supported by raytracing/pathtracing and instancing thousands of them? (or indirect instancing, whatever)
I'm talking about blowing in the wind, not just static trees/grass

Also, I'm talking about offline rendering for film...

 

I got some new ideas on how to avoid some limitations in DXR and also I switched to Quality GI (it`s lower my fps performance by 20-40%, but GI quality is better)

 

Which are you referring to, and how did you avoid/solve it?

 

Here is the list:
- correct position of Reflection Probes (fallback for reflection/GI)
- two Area Lights (inside Interiors and outside) One has the normal quality (4/12) and is small like 1x1 m, the second one, is big with min samples (1) with max blur samples. This makes a better effect than Physical Sky light (I keep also it just to fill light for the exterior part (terrace)
- Indirect boost for reflection and Diffuse (x2)
- Quality GI with one sample (and of course one bounce - not with Ampere 3090 - too slow GPU)
- My Nodes Surface System
- not using Translucency (DXR SSS is much better and offers the same speed)
- some tweaks in HDRP settings (smaller amount of cells for Area Lights, etc)

 

After over 2 years I finally finished my Interior system in DXR!
That was an incredible journey with new features (GPU system render) for me as CPU offline render guy (using Lightwave for almost 30 years since appearing on Amiga computer - v4.0 LW).
Right now I feel like in home with Unity (similar to Lightwave) and this will allow me to improve/invent new ideas without focusing on unknown fields. I prepare mysel f now for the Exterior system (I think I will be ready next spring 2023...maybe)
Here are some final renders from my test Interior (DXR system, 5-20 fps in UHD):

 

#2

 

#3

 

#4

 

Nice set of images in your last 4 posts. Would be great to see a comparison with these side by side with their pathtraced counter parts

 

newguy123 is not big difference. Of course is better looking but not that much, also I will render animation so I stick with DXR.

 

My quick non-clean fix was to move the corresponding folder from "Library/PackageCache" to "Packages" as unity was expecting it at the wrong path.

 

Hi!
3 weeks ago I switched to H-Trace engine, and this is the last scene done in Native Unity DXR (I did not switch this scene to H-trace). I made a decision to test in an Extreme way Unity DXR SSGI (and I really meant extreme) Maybe later will show this test when it is finished. The scene contains a huge amount of polygons, surfaces, and physical lights (I had to increase the number of raytracing shadows up to 256 in HDRP).
Meanwhile, 2 days ago I upgraded my GPU from 3090 to 4090.
If you think about 3090 ...FORGET!
4090 is like moving from car to jet. Everything is much better, including power consumption. This card even not get sweat!
before:






After:

 

Here is the test in heavy scene:

And one screenshot from GPU-z when use test extreme scene

 

4090 at least 50% faster with RT - decent increase. I hoped for something more radical, but it seems that is it and this is the best money can buy. AMDs multi-chip 7xxx GPUs, unfortunately, didn't feels like really multi-chip - only some kind of memory multi-chips were used, GPU die still in one huge piece and RT performance still 2-3 times lower than Nvidia...

 

Lex4art Increase is between 70-120 % depending on the scene and from GPU setup (I use Afterburner and no OC). But the best part is Power Consumption and Silence (watch screenshot from GPU-z). 4 nm lithography is really efficient.
The Power Consumption is between 70-150 Watts only with the default GPU run in Unity with heavy DXR scene.
Here, check the chart Ada Performance and Tensor/RT Cores + 16K+ CUDA:

 

If your 4090 can't use more than 70-150 watt then you're most likely bottlenecking somewhere. Also, H-Trace is a screen space effect.

 

Both are correct/incorrect ...actually Three things:
- bottleneck CPU (Dual Xeon 40HT 2.6 Ghz) for single thread application ...this is crap I do not think so this is a problem
- this scene above is Unity DXR (no H-Trace)
- PCI-E 3.0 (1-3% speed less)

GPU load above is 100%
This scene above with 3090 was really run as hell (Had to use Afterburner to reduce Power not to boil the case)

I have to see GPU-z under the Enemies demo.

For me: this card is simply really good. Remember also this is 4 nm lithography - that's very, Very efficient with energy GPU compared to previous Ampere gen.
So far I could overrun this GPU at all over this example.

 

Alright. I thought it was h-trace because the video starts with a big h-trace logo and it says you used h-trace in the description.
That xeon is definitely a problem.

 

Hi everyone!!!
I'm playing a bit with Unity 2023 HDRP and raytracing and I'm very confused.

I'm trying to make a room dark because there's no sunlight coming in...
But I can't get it. The ambient lighting of PBS always stays as you can see in the following video:

I have touched all the parameters of "SSGI" but I can not eliminate this annoying problem. I also have a reflection probe updating in real time... but it doesn't do anything either.

I'm confused. I have tried to follow this guide: https://forum.unity.com/threads/hdr...acing-lighting-troubleshooting-guide.1248550/
and other Unity videos like this

.
But I don't know how to solve these problems.

Is Unity not able to handle this type of scenario without having to change all kinds of settings in the PBS, intensity of directionalLight, or patching settings with "Indirect Lighting Controller or Exposure"?

How can I handle this type of situation? Any info, help, etc??

Cheers

 

This is because the lighting inside your reflections is not ray traced. You need to use baked lighting & reflection probes for the lighting inside your reflections, or switch to the path tracer.

Ray tracing this recursively in real time is very heavy and creates complex problems when it comes to denoising.

 

Nope.
I checked "double" Enemies with other specifications (much better CPU when we talk about frequency) Same resolution, and the same setting.
My Max GPU Mother Board Draw Power: 200-270 Watt.
This guy uses a much better CPU than me:

In the first video, I have around 10-15% more frames/sec (sic!)
In the second video, I have around 5-10% fewer frames/sec...but this is a monster CPU

No bottleneck.

This GPU card is simply good:
https://www.zotac.com/product/graphics_card/zotac-gaming-geforce-rtx-4090-amp-extreme-airo

 

Here is my test Panorama from Unity and H-Trace. My private free project.
I updated (and reminded after 2 years break) Pano2VR5 to Pano2VR6 for some new features which appeared in the last upgrades.
Do not watch some mistakes in features or object replacements because those are new for me and I did not learn altogether this time when I combined Panorama.

Panorama

You can run it on mobile phones also.

 

Nice work!

 

Volumetric fog with ray tracing (voxel-based?) gives very sweet effect for some areas/lighting conditions (scroll to 4:12 for example)... hope something like that will be possibly with ray tracing (e.g. for emissive materials to lit volumetric fog/particles)... someday... XD

 

Doesn't have anything to do with voxels in particular, it's just that the voxel version decided to implement it and the RTX one did not. RTX (or DXR for that matter) can do it a lot faster (and more accurate, because no leaking)

If you were to do this in HDRP, you would need some light sampling strategy and at least 1 extra ray. Zyanidelab recently wrote a nice article about participating media for anyone who's willing to give this a go.

Here's some stuff I've been working on recently.

I wanted to create stereo reprojection and hybrid shadowrays for HDRP DXR. I did not have any experience with screen space techniques so I decided to study these in late 2022. I built Crytek's 2007 sphere kernel SSAO, then surface normal oriented hemisphere SSAO and then ray marched SSAO.



With this knowledge it was time to go back to HDRP DXR.



VR stereo reprojection for RTGI. Only the red tinted pixels on the right eye are ray traced, the others are re-used from the left eye. This actually reconstructs the view space position on the left eye and then rejects based on a defined depth + normal heuristic. Since diffuse is independent of the view vector it's pretty reliable for re-using samples. (except in theory some minimal bilinear blur)

I want to do the same for RTR, but it is a little difficult in the default HDRP DXR setup due to the way the rendering is fragmented and what kind of sample distribution is expected by the BSDF (because moving the camera changes the sample distribution, because it is view vector dependent).



Hybrid shadow rays. For as long as the ray is on the screen, it will march the depth buffer, when the ray leaves the screen, it will start DXR TraceRay on the position where the screen space ray stopped. Green tinted samples found a hit in screen space.

Edit
I just finished stereo reprojection for RTR. It stochastically rejects samples based on NdotV & roughness.

I have also experimented with re-weighing the samples based on both sampling domains (because the specular lobe moves) but it will give no benefits in a single frame.


No reprojection


Reprojecting both diffuse + specular

RaytracingIndirectDiffuseEvaluation
Stereo reprojection disabled : 9.4 ms
Stereo reprojection enabled : 5.1 ms

RaytracingReflectionEvaluation
Stereo reprojection disabled : 9.7 ms
Stereo reprojection enabled : 7.1 ms

I'll soon see if I can strip down the right eye pass a little more, and if there are any benefits when it comes to using a "center eye". I also want to explore using a different slope for the lobe approximation, just like how the balance/power heuristic works in MIS.


Specular rejection mask

 

m0nsky
Question about the annoying Limit with Maximum Lights per Cell


How I can increase this limit?

 

Personally I don't use rasterized lights so I haven't needed it. The only thing I can recommend is to inspect the light cluster debug mode (which you can read about here) and then change your camera cluster range to see if scales the size of the cells to something that better fits your use case.

 

m0nsky Yes I know but this does not help when a lot of lights are in a small space. I was thinking maybe some deep settings, somewhere. Pity that the limit cannot be overridden.

 

I can override the limit and create a project with a custom HDRP package for you, but I can not guarantee it will work. You will have to test it yourself.



Just tell me which Unity version you prefer and I will get it ready tomorrow.

 

m0nsky great!
2021LTS

 

Here you go, this one has a limit of 128 lights per cell.

 

Thanks! Work!
Will test it soon with a real scene.
It is difficult to do it? I mean to change HDRP asset, for example, if want to do it in an older version? or how I can activate it in the older Unity version?

 

No, it's pretty easy if you have some experience with modifying packages. Sideload your HDRP package (clone from Library/PackageCache to Packages folder), navigate to Runtime/Lighting/Lightloop/Lightloop.cs and change k_MaxLightsPerClusterCell (line 289) to your new maximum value. I have not checked anything related to allocations/buffers so I don't know how high you can go before you run into trouble.

 

Thanks!
There is no need to go high because in extreme situations I feel like 4-8 slots are missing.
So 24 is at the edge and I think 30-34 will be enough.

 

Sr, you are a very good sr...

 

m0nsky
Works like charm!
34 slots is enough for me

 

m0nsky Silly question:
How I can EXCLUDE LEM object from GI in Path Tracing? ...so I see exposure (for example outside background for Interior) but it does not participate in Global Illumination.