Official Unity Experimental HDRP DXR

Try material type: translucent
Refraction Model: Box, with ior of 1.5 or so and color maybe 230,230,230

That should make the glass look better, however I'm not sure if that will do anything to solve your additional noise in pathtracing... do a quick test and let us know.

You may need to adjust cam exposure, which in turn will make the outside brighter also and look more realistic

 

Thanks for helping.
My problem is not additional noise it´s dark pathtraced image (because of light blocked?).
When I enable refraction on my material I get this "frame" that reflects only the sky:



I can set the screen offset of that frame with a Screen Space Refraction override but it´s simply wrong.
I have no probes, everything is raytraced.
Pretty sure there´s something missing in my hdrp-settings....

 

The image gets darker but also additional noise. Depedning on your needs, you need to light and expose properly, just like they would do it in real life. In real life if a photographer does realty images, he has various infill lights, and also take various exposures and then combines it in PS to blend the outside and inside better. Having a shot like that, looking from inside, towards the windows, you're never going to get a S*** that is properly exposed for bgoth inside and outside at the same time, without some cheating. I'd suggest expose for inside, which will likely blow out your outside, then either just dial it back a bit, or adjust your glass refraction, or cheat the sky exposure.

you need screen space refraction and set the number to 0.001 to get rid of that frame

 

Cascho01 here is hint for you:
In architecture rendering glass ALWAYS should be used with Unseen flags.
In theory glass has no influence for Global Illumination so you must exclude it from GI and shadows - that's is more secure for Photons and generally for rendering. This is standard and common procedures everywhere in renderings.
This is very simple:
when you have windows glass in interior you have to exclude this object/layer:
- Unseen by Radiosity
- All Self flags
- all cast and receive

It looks that (in fact this is GUI from Lightwave but idea is universal and standard everywhere):


I would like have this "easy flags" in Unity because now, all flags are spread everywhere.

Also second "problem" in renderings is missing information in Global Illumination when we render Interiors.
This is typical and to prevent this all professional renders engines has Light Portals. We do not have it in Unity at all...maybe in future. To prevent this problem partly, you must put physical light (not LEM...Unity is not ready for that) into windows to "boost" amount and quality photons inside of interior.
NEVER use Interior lighting without booster or Light Portals!

 

Here you have info how LP works (light source: Physical Sky+Sun):

Without Light Portals


With:


Light Portals can be also boosted. In this case above Multiply value is 1.0 but usually LP must be boosted like 5.0 - 10.0 to increase brightness inside room.
Here is example with LP and boost 5.0:


I traditional way is simple impossible to get this quality of GI and correct brightness inside.

 

I'm having a raytraced reflections cut-off issue and I cant figure it out.

On alpha of 128, the reflection works fine:


If I go any lower, then reflections are ignored and it just shows the sky as reflection:


Doesnt matter if I used mixed, raytracing or raymarching


On the other hand, it may be a refraction cutoff and not reflection cut off, but still, cant figure it out

 

Same thing here... ?

 

Hmm, I know about lightportals from VRay.
I´not sure if it´s a good idea to manually place AreaLights in front of the window.
This will conflict with the skylight color etc.....

 

Yes that`s correct, if we talk about colors coming from Physical Sky mixed with LEM or Area Light....
This is call Studio Lighting System and is used widely by everybody (studio rendering has nothing to do with realistic light and is common in architecture).
Many people even simple disable Physical Sky + Sun and use only Area Light in windows + Fake Sun with very soft shadow Area Light. That`s also common.

Personally I use LightPortals as best solution available today.
Also I warn not to use only Physical Sky+Sun for interiors - that's the worst solution which you can choose.

 

So you suggest arealights in front of the windows also in Unity?
Will check it out ...

 

...you have no better alternative right now in Unity...

 

Have you tried adjusting your light cluster settings - might not fix, but has helped in the past for me

 

So I upgraded my Unity version and HDRP version and I'm still getting Raytraced Shadow artifacts, particularly ghosting but also some weird glitchy looking stuff. Is there any way to fix this or reduce this?: Unity 2021.2.2f1 with HDRP 12.1.1

 

Simply didn´t know that passing through a surface counts as a bounce.
Increasing the max depth helps, thank you.

 

Another question:
I don´t get reflections on glass behind another glass surface:

 

Sorry, the upper shots are not pathtraced. So where would I set the max depth?

 

@chap-unity do you have a typo here? Did you mean to say "we CAN'T stack"?

 

@chap-unity Is that something that will be improved in the future, or best bet if you want that sort of thing is to use pathtracing instead of raytracing?

 

Yes I tried recursive already but it works best for smaller irregular shapes. Its not realy suitable for window glass, especially if you have various panes in front of each other. GI seems to get messed up in refraction

 

Three of them are bad ...but I understand this is not easy to do, so better than nothing

Actually....transparency and background GI light sources (Sky, color, HDRi) are two big challenges right now in DXR.

 

I have refraction model on my glass to "none" but still when I have glass B behind glass A with SSR enabled the glass B is not rendered - as you described.
In other words, when SSR is enabled transparent is not rendered behind transparent.

 

Thanks for explaining.
It´s a pity because it´s a hughe drawback (at least for archviz / interieurviz).

By the way, recursive rendering completely solves this, but then I get heavy TAA "ghosting" (right word?) for objects behind the glass. See smeary trees on the left side: Any way to solve/reduce this?

 

hehe of course it is. Sometimes I "miss" my CPU rendering

 

WIP of my rain implementation for Buildmark:

Technical details here (VFX Graph + tricky cameras setup).

 

Those are pathtraced I take it @m0nsky ?

 

Ray traced (RTGI performance, RTR quality 2 bounces)

 

which HDRP version @m0nsky ?

..and what AA are you using?

I'm not getting anything near that quality (with all my RT settings on quality)

Your lighting and exposure also seem pretty good

 

HDRP is current master (13.1.2), using only DLSS @ 66.64% resolution scale, auto exposure.

 

Does Furioos GPUs not support DLSS?
Will Furioos provide better GPUs someday?

 

Playing around with lightlayers:
Is it possible that SSR reflections do not support lightlayers?

Example:
I have a light that affects lightlayer1 only.
But in reflections all geometry is affected by this light, also geometry which rendering layer mask is different.

 

Some real time recorded video, this is running on my local HDRP fork which has some extra tweaks.

- Two pass RTAO denoiser
- Visible normal sampling
- No RTR clamping
- RTR denoiser max kernel size 0
- Converting some remaining _ScreenSize to _PostProcessScreenSize

It's a little choppy because I'm not using my custom RTAS here, this is using the one from master (cullinstances API), but there seems to be an issue with inconsistent DXR/DX12 performance. I'll reproduce this in a sample project so I can submit a bug report.

Edit
Seems like upping the clamp value to 100-200 (10 is default max) has the least reflection intensity loss in the dark, after that you get diminishing returns (as seen in the video)

 

Impressive and a breathtaking video. Loved the music

 

@m0nsky

1) "No RTR clamping" - I'm very interested in this. How may I implement that in 12.1 with 2021.2?

2) The other points you mention, no idea what those are.

3) In your video, there's some very heavy ghosting going on here. What is the cause of that?

 

High clamping values (or no clamping) can result in issues like excessive noise and fireflies, but I think it works really nice in some situations (reflections in darker areas). If you know how to load packages from a local directory, look at the finalColor clamping logic in RaytracingReflections.raytrace

About the ghosting, I just did some testing with this to be sure. It's not related to ray tracing, denoisers or DLSS but actually a problem with physically based depth of field. I just noticed this PR was opened 2 hours ago that could help.

Edit
Ok, I checked HDRenderPipeline.PostProcess.cs, physically based dof actually reads the TAA params from your camera. So even if you are using DLSS without TAA, set your TAA fallback to "high" and enable speed rejection, this will fix the ghosting with physically based dof when using DLSS.

 

Been toying around with the Archviz asset that was in the lightning sale.

 

These images look great, untill you click on them to look 1:1 size. Whats up with the TERRIBLE AA?!?

What are you using here, TAA or DLSS?

 

DLSS. No idea what that might cause. Using 2022.1.0a15.

 

Rowlan this scene is good start for playing with DXR. Of course you understand that this Bake system is useless for commercial purposes but as starter is really good idea.
For AA solution you have two choices right now:
- DLSS - which is not so perfect but much better than standard AA Unity solution
- SSAA SunFall plugin - best solution, prefect AA!

Apparently SunFall must be updated for new official Unity (so also Alpha/Beta) due some script errors. I got info from Discord that new, updated version is upcoming.
Also SSA SunFall has one advantage: due his procedures (inside GPU?, rescaling similar to DLSS, Full Screen AA?) you get less noise - so you can reduce amount of samples for Physical Light and GI!...in other way: more fps.

 

Thanks, I gotta check that out. By the way, do you have any idea why this kind of noise appears once I enable AO?

 

Rowlan I am not sure you use DXR...if yes, then you must be careful with some custom surfaces.
Best idea to investigate problems is disable object one by one to see which one create problem.
I suspect too big Normal Map value from one of surface. I have this scene and most surfaces uses Mask Map , that also can produce some errors for DXR. I have not enough info from you what you use: original scene bake or total DXR or half DXR half bake (for example bake scene with DXR reflection)

 

Oh, I'm total noob. I just set everything from bake to realtime ... I'll try again with bake and re-bake it all. Thanks!

 

What I do is basically:

* create new HDRP scene
* convert to DXR scene
* fix all the points that the HDRP Wizard complains about
* open the ArchViz scene
* add a new global volume, add AO and activate raytracing

This is the result:

 

1) Switch off all volumes that import with that scene.
2) Leave on your own volume and also add:
- screen space global illumination (enable raytracing in here)
- screen space reflection (enable raytracing in here)
- exposure and adjust as needed
3) for all lights enable raytraced shadows on the light itself
4a) on your cam enable TAA and set it to high
OR
4b) ensure your HDRP asset has DLSS installed and enabled, then on your cam enable dynamic res and enable dlss

Then show us a screenshot again....(in game view, not scene view)

 

chap-unity
I am not sure is new bug in actual official latest Unity 2021.2.3f1 or two-three versions back.
I never had so many crashes when I imported object into Unity and this is connected with creating UV LightMap for Bake.
As you know I use LWImporter (Lightwave integrated system in Unity) so at first I was thinking maybe something is wrong with plugin (Last update of this plugin was over one year ago) But after many hours I realized that can be something wrong with Unity UV mapper creator.
Situation is ok when I import object just for DXR purposes (no need UV LightMap for Bake) Plugin for Lightwave in Unity contain of course option to create UV LightMap and if I do not use it everything works perfect.
So to be sure I exported object to OBJ format and...I start getting crash also when making UV LightMap.


Here is OBJ format. Can somebody confirm is something wrong with this official Unity version?
Of course "bug" can exist since unknow time maybe like since 1-2 months (because I starting making some new pipe lines for BAKE I return for while to this system and I started getting crash)


I know that object has practically only quads (but this should be doesn't matter for Unity...also I have crash when I triangulate all quads...)