Ultra Critical! V-Ray 6 for SketchUp, hotfix 1 upgrade stops CUDA/RTX rendering from working.

[QMG]

Ok so apparently the downgrade wasn't enough, all Vray 6 updates destroy our workstations. Will have to downgrade to Vray 5 (2.5)

[Muhammed_Hamed]

What driver are you using ? Please make sure you are on the recommended driver
It might be a good idea to do a system reboot, to make sure the driver is fine

[QMG]

What driver are you using ? Please make sure you are on the recommended driver
It might be a good idea to do a system reboot, to make sure the driver is fine

Thanks but I've been through all of that. Using the most recent of everything as stated before.
Im back to Vray 5 now and renders are working again. Sadly have to redo work to get back to my previous build.

[QMG]

Just to recap this major bug.

All Vray 6 for SU22 is crippled.

Renders do not engage the GPU's and do not render.

Frame buffer window typically doesn't open.

Logs full of errors.

Nothing exotic running on our workstations

Vray 5 works perfectly.

Spec: Newest version of NVIDIA drivers (528.02), 2x 3090's SLI/NVlinked with original NVIDIA branded hardware, 512 GB of ram, AMD Threadripper Pro 3995WX, Win11, Sketchup 2022

[Muhammed_Hamed]

I'm sorry to hear that QMG

We are investigating the frame buffer issue now
About Error 700, it could mean many things from driver to hardware issues
Best is to stick to the recommended driver 526.98

It is odd rolling back to older V6.0 builds throughs new errors on your scene, and you have to use V5.2
I will post when I have an update

Best,
Muhammed

[luisgamino2]

Hi QMG, Kontantin and Peter Chauchev

I am a vray gpu user for so long and i would like to express my self here.

I cant believe how unstable is vray gpu, is incredible than even with a new major versión we are still suffering with vray gpu.

we dont get new features, we cant match the quality from vray cpu and then full of bugs.... This is really serius Konstantin and Peter chauchev... Why we are always suffering...while vray cpu always works out of the box.

With 5.2 i really found a lot of issues and again with 6.01...is not working right.

That is why i havent upgraded my licence, something was telling me that dont risk my money since probably there are issues with vray gpu.

This is the real truth Konstantin and Peter chahchev and sorry to express my self like that...but imagine paying 1000 dollards for the upgrade and then fails again.

I really hope a total effort with the update 1 for vray gpu.

Thanks
Luis Gamiño

[Muhammed_Hamed]

Thanks for the feedback Luis, as always

I'm aware of your GPU feature demands, we have texture compression coming in the next major update. It is nearly production ready, and will allow you to fit double the amount of textures into your GPU memory

About instability, anything I'm able to reproduce on my side I make sure it gets solved. We take this seriously
other than out of memory options you run into, is there any crashes your reported and we didn't fix?

Development takes time, there is a current priority list for GPU development. Feel free to message me about your requests any time, explaining your use case. I take all suggestions to fit in the current/future priority planning.

Best,
Muhammed

[Muhammed_Hamed]

```while vray cpu always works out of the box```

It exists for a lot longer than V-Ray GPU, it took a lot of time and effort to get it to this state. Our goal is to make V-Ray GPU as good/fast as the standard V-Ray renderer.
Keep in mind that we are limited to Cuda and Optix APIs, not all CPU features will work on GPU because of hardware limitation. The GPU code is just different, for many things the devs need to look into workarounds, or research ways of achieving the same results on GPU
Something like caustics for example, the current progressive caustics will never work on GPU by design.

Best,
Muhammed

[luisgamino2]

Hi Muhhamed

I complete understand your point even for a simple shader takes more time to develop for vray gpu than the vray cpu system.

My main issue is the stability lets see, with vray gpu 5 it worked fine with 5.1 it worked really great... but then you changed the light cache to calculate with the gpu and that change brought a lot of issues with 5.2, right now i still use vray 5.1 as i told Konstantin because is really stable works really nice, but i still miss some things from 5.2

One of the things that i would like to express my self here is about the interactive render with vray gpu with light cache... before you bring it to the oficial builds try it Hard by you own i really dont want to see again what happened with 5.2...issues and issues.

How is the work with diffuse roughness Muhhamed???

Are we going to see this soon??

Really usefull for textils

Thanks
Luis Gamiño

[QMG]

Hey All and hello Luis...

I understand this is a frustrating issue especially right in the middle of an important project like myself today.

Vray delivers some of the best renders the industry has to offer while bugs can hold back that fantastic nature. As a developer myself I know the hours spent running code to get something right so I have a great respect for it. On the other side enterprise/pro software should not have such issues imo. Seems like Vray 6 was rushed so hopefully the team sorts this stuff out asap so we can get back to work doing what we do best.

We will be upgrading to 6000 ADA Lovelaces soon so I hope everything will work better then otherwise emotions will rise

[luisgamino2]

In this treat what i can see is vray gpu still crashes a lot i remember this with 5.2 a heavy text in red and it keeps growning úntil is impossible to stop the render and then i had to turn off the work station


Is this fixed??

Even marthamartkamp a vray user that was in the vray 6 beta complain about that...the heavy crashes with long texts in red

Is this fixed??

In this trata this seems the same, vray gpu 6 is still crashing so Hard that makes unstable not only the software but the complete workstation

[luisgamino2]

Hi QMG

I totally agree with you, vray and chaos group had been doing a really nice work with vray and chaos vantage, i really like these render software helps to express your self as an architec and as a designer, vray brings a really nice photorealistic renders at really high quality.

I have been using vray first then switched to vray gpu for almost a decade.

Never looked to lumion neither enscape just pure vray for sketchup to express my self in spaces.

What is really a disappoint is that we even in vray 6 a total mature software fails like that.

Im an architec from Mexico, i use 2 2080 ti with nvlink almost never use vray cpu. I take care of my scenes and always try to do high quality renders

Everything was fine until vray gpu team decided to change light cache from cpu to gpu and that brought a lot of issues...Probably this remain with vray 6.


This is when i talk about feedback... I was almost thinking in paying my perpetual licence from 5 to 6...But then i saw this treat and i was awere that there are still issues.

I agree too about the development it takes time to bring new features to vray gpu... But at least bring a stable software.

[QMG]

Ok we have followed the directions from customer support and I should update our results with an edit here. We have deployed onto different workstations and we now can see with this driver change Vray 6 is functioning again.

The issue was indeed related to the Geforce driver version being too new. However, I had just upgraded the driver from an unsupported version and was not facing such issues, so there is a clear issue with driver to Vray code. Im guessing the devs have been coding for an old CUDA version hence the massive issues with any driver outside of what was recommended.

This however is still a problem as some software/hardware requires drivers to be recent making way for a driver versioning issue across different configurations. As this is the case, it would be best practice to update code base to the most recent versions of CUDA/Geforce etc.. so this range of issue can be reduced to min.a 2 version spread.

So I suppose the next logical question to the dev team is when will Vray 6 be optimized for the most recent drivers?

[QMG]

Well no I spoke to soon. After a restart of the workstation renders again do not work.

1/27/2023, 3:52:28 AM●[syncStream] 700: Stream sync failed

[QMG]

This is sad.