Vray gpu update 2.2 didnt work

[luisgamino2]

Hi Peter or Konstantin

This build didnt work as it should be, is taking again a Lot of vram, when vray gpu loaded all textures then vray gpu jump from 8.7 or 9.0 to 10.5 or 10.6 then vray gpu crashed... And Also is impossible to use this new light cache since is going to take another bunch of vram when is going to render... For me vray gpu light cache is a complete waste of time, it doesnt work, i'm very tired of this stuff, bring gpu light cache with cpu, what is the problem!!! I'm just loosing My time with You chaos group, i want to render a proyect is impossible... I hate to express My self this way... But i'm fucking tired of this bullshit of software i'm waiting almost month and a half just to render a scene and is impossible... With vray gpu 5.1 when vray loaded all textures it didnt take a lot of vram just stays as 9.1 or 9.2 and then start to building light cache, but didnt take another bunch of vray as vray gpu 5.2.... don't You see it!!! Please bring a software that really works or are You going to bring back the Money that i paid to You... Is not working!!!

Very very tired of a sofware that doesnt work, what are You going to do... Is not only My, there are a lot vray gpu users that is suffer with this sofware

Why You didnt keep light cache with cpu, vray gpu light cache isnt working... What are You going to do!!!??? What are You going to do!!!???

[slavcho.brusev]

Hello luisgamino2
Sorry to hear about the crashes you had experienced.
Update 2 should have resolved the GPU memory issue. To make sure that the issue is indeed linked to Light Cache could please disable(use Brute Force instead) it and test render again to see if it will crash.

Additionally, could you please send us the project for additional investigation? If this is ok with you please use the Pack Project tool(Extensions > V-Ray > Pack Project) to make a zip copy of the project and upload it to the "request" link below

https://support.chaos.com/hc/en-us/requests/new

Include a link to this forum thread in the request.

Thank you!

[luisgamino2]

Hi slavcho. Brusev
From My experience since vray 3.6 vray gpu first load proxis then load geometry and finally load textures when vray gpu finish loading textures then starts light cache... I don't understand why with update 2 everything is ok, but when vray gpu finish loading textures then it takes like 1 GB or 1.5 GB before Even start light cache then i get a crash, why is taking again 1.5 GB, vray gpu jumps from 8.7 or 9.0 ( when all textures are loaded) to 10.6 or 10.5 and is impossible to build the light cache since is full the vram from the gpus.

This is My Main concern why is taking 1.5 GB again when is almost building light cache??? Can You explain why this is happening???!!! You have to understand that this is not normal behaviur, if You can keep vray gpu light cache with the old behaviur is going to be great, but if vray gpu takes again 1.5 GB extra before building light cache then is not to going to work like it used to do, and if You can't keep the old behaviur then bring back vray gpu light cache with cpu, Listen slavcho brusev i AM not going to send You the scenes since i work like an artist i don't want to show My work before My clients see the proyect... Brute force + bruteforce is not an option is very slow very slow and i don't like how renders look with this method... I had spent more time writing in the forum than using 5.2 is very stressfull for me i want to use the new tools the new materials or the new sharp and blur in the VFB. SO what is the future for vray gpu it is going to be that way...???

If You like we can keep a virtual sesión to show what is the Big problem, You already know since You tried before me, but i can show You in a live sesión that vray gpu 5.2 is taking so much vram than 5.1 i can install and uninstall both versión to show You the Big problem that You brought with update 2

Thanks

[Muhammed_Hamed]

Sorry to hear about the issues Luis, for this hotfix I did test the scenes you uploaded in the past with update 2 on the same GPU you have and it rendered fine for me. I don't get any crashes
A live session would be great to take a look at your setup and investigate the crashes further, let me know about a suitable time for you please.

Best,
Muhammed

[Peter.Chaushev]

Hello, Luis,

It is expected for the RTX engine to use more vram than CUDA.
The V-Ray GPU team is looking into further improvements aimed at lowering the difference.

The Progressive sampler will also help with the memory consumption. On average Progressive mode consumes less GPU memory than Bucket, on high end GPUs.
Bucket sampler remains the better option, however, if you distribute the render process between multiple machines.

I understand the frustration of suddenly not being able to render projects that were perfectly fine with a previous update and apologize for the inconvenience this has caused you! While it may seem like the GPU engine's capabilities have regressed, the latest improvements have an overall positive effect on the majority of a wide variety of scenes.
Nevertheless, we now use the projects you and a few other users shared with us as benchmark tests and will remain doing so until we hit a balance where the GPU engines retain all enhancements from the recent updates while the irregularities stemming from increased resource usage are minimized.

With all this said, my offer of remote assistance via TeamViewer still stands. Both I and my colleagues remain available at any time that is convenient to you.

Kind regards,
Peter


TLDR: Please use Progressive sampler with the CUDA engine for each of your scenes which the RTX engine failed.
Your scenes were rendered successfully using v5.20.03 with a hardware setup similar to yours.

[luisgamino2]

Hi Peter and Muhammed

I think the Best way to show You How vray gpu 5.2 works is with a virtual sesión i really want to show You some proyects that renders perfectly with update 1 and doesnt render with update 2, i understand probably this was a major task vray gpu light cache with gpu so thats why a Lot of people are having problems with vray gpu, as i wrote before vray gpu from 3.6 to 5.1 was great with a little problems, but renders fine, i really was enjoing vray gpu, but since 5.2 something really changed that makes a Lot of crashes. Well we are almost in crhistmas i think we can shedule a date after january 4 since i saw that this days is going to be holidays for chaos group and probably for a Lot of people, this is very important to me... to enjoy update 2, so the Best way is a virtual sesión this is going to help to visualize what's going in on with the software and help to develop a better software so a Lot of people can enjoy vray gpu, i already told Muhammed that i'm an Architec from México, and You have your Office in Bulgary in Europe, for me whatever hour is fine, i work by My self so i don't care if it's really night or really morning, but this is very important, so have a Nice crhistmas and a happy new year, im going to write in the forums aprox in January 4 or 5 to see what's going in on with vray gpu 5.2, Also You bring a very interesting things with the new hotfix, i really want to enjoy the last update.

Thanks Muhammed and Peter
Best regards

[luisgamino2]

I did a try with cuda and didnt work not Even with progressive neither buckets, with cpu in hybrid mode and with out cpu in cuda, is happening the same that rtx mode is taking again like .9 or 1 GB before build light cache and i think vray gpu is going to take a little bit more vram just to start to render as it happens with update 5.1 but 5.1 renders fine with cuda and rtx, so i'm going to write You Peter in chaos group forum in January 4 for a teamviewer and do some tests with My proyects with 5.2 and 5.1 this is My first time with a live sesión with chaos group team i don't have a clue how things are going be for the life sesión, You can explain me latter how it Will be, and thanks for bring this attention, Also i'm using 496.46 nvidea Game driver, since Muhammed recomends using this driver at vray gpu section in the forum

[Muhammed_Hamed]

Let us know about a suitable time Luis, myself and Peter will do the remote session to check your setup. Thanks!

Best,
Muhammed

[luisgamino2]

Hi Muhhamed
It Will be great if we could do a team viewer on thursday, January 6, maybe around 9 pm ET

Thanks

[Peter.Chaushev]

Hello, Luis,
This will unfortunately be 04:00 am in our time zone. I've sent you further details via forum pm. Please follow up there.
Thank you!

Peter

[Peter.Chaushev]

Here is a summary of the steps defined during our meeting with luisgamino2 to make GPU rendering of large projects possible if they originally overreach the VRAM consumption.

• https://forums.chaos.com/forum/v-ray...ds#post1123477 - this guide explains how to optimize the workload when having multiple GPUs.
  One of its steps - enabling "Hardware accelerated GPU scheduling" works for any Windows setup (1 or multiple GPUs) and reduces the amount of GPU memory the OS takes.
• Use CUDA instead of RTX engine to help ease some of the vram memory load.
• Use Progressive sampler (enable "Progressive" toggle in the Settings > Render section)
• Use Brute Force / Light Cache are set as primary/secondary GI.
• Set the Light Cache subdivs to a lower value (e.g. 1000). This is doable through the Light Cache section.
• Ensure the bit depth of GPU textures to 8-bit. The option is available at "V-Ray GPU" rollout of the Render Parameters located in the right-side Settings panel.
• Input the following code snippet in the Ruby Console and press "Enter" before initializing the renderer. Keep in mind this has to be done for each project and the effect will be negated if you restore the settings to their defaults or load a custom .vropt file.
  The Ruby Console is accessible through SketchUp's menu "Window > Ruby Console" or "Extensions > Developer > Ruby Console".
  

  	rtEngine = VRay::Context.active.scene["/SettingsRTEngine"]
  	rtEngine[:gpu_samples_per_pixel] = 16
  	VRay::refresh_ui

  This last step will only need to be executed until the next minor update (v5.20.04) is released. The solution will be automatically applied to your scenes from that version onward.

Other properties that should always be considered are whether the scene contains excessive use of V-Ray Fur, V-Ray Displacement or a large amount of heavy objects which are not converted to proxies.

Kind regards,
Peter

[luisgamino2]

Hi Peter
I Decided i'm going to keep 5.106 since its a very stable build, i liked how light cache looks but as we talked it needs to be polished since is taking more vram than 5.1.

I didnt know how Big was the difference using 32 bits to 16 bits, thats why sometimes i suffer about vram Even with 5.1, i'm using right now 16 bits so the textures doesnt take too much vram ( this was a Nice advice in the meeting) for me using 8 bits it is very poor about depth of colors Peter i only get 256 colors and with 16 bits i get 65,000 colors but with 32 bits You get millions of colors, i was doing some research in the weekend. I'm going to render My proyects with 5.1 using 16 bits, since 32 bits takes so much vram on textures.

Also using 800 for light cache is very poor ( for the large scenes), i like to use 2000 so i get a very clean and Nice light cache.

So as summary vray gpu 5.2 works but You have to use some codes, poor depths for the colors like 8 bits and a low light cache, i read your post and with the next hotfix this code is going to be automátic with the core, this is going to help, since i don't want to write for every scene render this codes.

I really hope chaos group team keep the same vram than 3.6, vray next and 5.1 i have been working on those scenes from 3.6 until right now with 5.1 and it always took the same vram on years, but this totally changed with 5.2 is taking so much vram, as we Saw in the scenes.

Since i already use skatter 1 and 2 and i had to paid a month licence to Cg axis textures to get those textures that are in the chaos cosmos since this feature is only available for update 2, and im going to use Photoshop for the sharp-blur tool that is working with update 2.

So please keep the same amount of vram that vray gpu older versions (3.6, 4.0,4.1,4.2, 5.0 and 5.1) i really like vray but vray gpu needs very serious work.

I don't want to keep all My life with 5.1 build, i want to enjoy further developments!!!

Thanks Peter

Best regards