Vray 5.0 for sketchup slower than older version 3.6 !!!! Why ??

[karim_baaziz]

I recently upgraded my 3.6 vray for sketchup to the latest version 5.0 and it seems to be super slow!!! VFB on certain models does not even want to launch however I had no issues before on the older version why is this hapening???
Intel(R) Core(TM) i7-6800K CPU @ 3.40GHz 3.40 GHz
RAM 64.0 GB
GPU: Nvidia Geforce GTX 1080

[luisgamino2]

Hi
Im feeling the same way, new materials, new frame buffer, new light mix and it is still very slow, Even slow than next, i hope we can see an improvement in speed in the next update, i use vray gpu for sketchup

[karim_baaziz]

I had even models well built and rendered in 3.6 with no problems at all, now when I upgraded to vray 5, rendering the model became impossible. I'm just wasting time tyring to fix this issue.

[konstantin_chaos]

Hi guys,

I'm very surprised to hear this actually.
We haven't made any significant performance related change in V-Ray 5.

However, there might be something we've missed.
Can you guys share any example projects that show this difference?
The more projects we have for testing the better.
To share the models you can use any free file transfer service you like and then shade the link to the file as a direct message.
Another option is to attach the models to an issue in our support system.
It is very important that you share the 3.6 or Next scene before it has been upgraded to V-Ray 5.

Additional info which might be helpful:

• Which stage of rendering is slower? Is it the model loading time (before the rendering starts) or the render process itself? If it is the rendering stage, is the Light Cache prepass taking longer or the final frame evaluation?
• Which V-Ray 5 version are you using to test this (or is it the same with all V5 builds)?
• Do you have the global Contours enabled? This is an effect that can slow down the overall rendering even if it's only visible on a couple of scene objects.
• Is there any other V5 specific feature that you've enabled after upgrading.

Thank you very much in advance.
Also excuse us for the inconvenience.
We will do our best to resolve this issue once we can reliably reproduce it.

Konstantin

[karim_baaziz]

basically vray 5.0 does not even want to render the image. I opened the 3D model in the new sketch up 2021 and run a render with the latest vray 5 and crash immediately.Then opened again and reverted vray settings to default and it did not even want to open the vfb at all. However I had no issues at all on the older vray 3.6 with sketchup 2017. not to mention the settings are just super basic. Anyway I would appropriate if you could help with this . K
Download link below:

https://we.tl/t-B7rQQL0N1N

[luisgamino2]

Hi Konstantin

Well not everything is bad news, some things work right now with vray 5.1 update 1.5 very Nice for example not vram problems, i can render almost every heavy scene with update 1.5 the 2 gpus share very Nice the vram pool (nvlink works Nice), before that for example with vray 5 i had a Lot of vram problems, but update 5.1 hotfix 1.5 seems very stable and this is very important too. When i render an exterior scene vray gpu works very Nice and very stable, but when i render a Big interior scene and i have a Lot of Windows with gardens, lights, shadows, then vray gpu suffers... Buckets get stuck for hours Konstantin in Windows, they take so much time to render that Window, probably for refraction of a window, two sided material for the garden, something weird happen when You render a very heavy complex interiors, thats why i switched to progresive render.

I already read some treats in the forum where vray maya users and vray for 3d max users suffer for this, buckets get stuck for too long when is render a refraction material, like a Window for a house, or a Window for a car, or something similar, sometimes i get diferent time with vray gpu, with same scene and same settings, but then You render an Open space and it render faster and very smoothly but vray gpu suffers with interior spaces and speacilly when You want to render a Big garden that is seen from a Window, i like how buckets move in the render, i enjoy when buckets move and a can take My cup of cofee but when is time to render that Window... Holy smoke... That takes forever!!!! And with progressive it takes less time and Also i can stop the render if i already like the noise, but with buckets there is a Big problem with refraction materials, not like vases, but a Big windows with a Big gardens that You can see trough the glass, so as a conclusión, i can render every scene this is the most important thing, Also heavy exterior scene works Nice not problems render faster Even with very high settings, but heavy interiors scene with Big windows is a Big problem because You have to wait to finish that buckets, Also is normal glass not high settings for that material max depth from reflection and refraction is 5 with materials and Also with global settings is the same, this is My Main concern about vray gpu, with vray next i remember render a Big windows and buckets didnt get stuck in interiors spaces, for me i'm very happy with vray 5 Konstantin i have a Lot of new features, i apreciated composite for example, the new coat and sheen material, vray 5 is great!!! But needs to be more efficient when render a heavy interior scene, and probably all the renders suffer with complex interiors scenes, corona, maxwell, fstorm, probably because You have a Lot of bounces in a interior scene than an exterior scene
Thanks for taking your time in this feedback
i'm going to build a very interior heavy scene this weekend so i can send to You, vray 5.1 with chaos cosmos was great again!!! I apreciated this Big Quality library!!! I use 2 2080 ti with nvlink and vray 5.1 update 1.5

[karim_baaziz]

Hi, I manged to find the issue. There was a small component on the entire scene that vray 5 did not like and was causing sketchup to crash every time I was trying to hit the render button. Very strange because vray 3.6 was not reacting the same way or maybe it was sketchup 2021 was not liking the small mistake in the model. However 2017 sketchup with vray 3.6 was perfectly fine with it.
Anyway problem solved.
Thanks
K

[konstantin_chaos]

Hi karim_baaziz ,

Hi, I manged to find the issue. There was a small component on the entire scene that vray 5 did not like and was causing sketchup to crash every time I was trying to hit the render button. Very strange because vray 3.6 was not reacting the same way or maybe it was sketchup 2021 was not liking the small mistake in the model. However 2017 sketchup with vray 3.6 was perfectly fine with it.
Anyway problem solved.
Thanks
K

Thanks for letting me know and thanks for the file.
We will still look into this even though you now have the scene working.
A scene which was rendering fine iv V3 should not be crashing in V5!

I'll let you know once the issue is resolved.
We'll include it in an update as soon as possible.

Regards,
Konstantin

[konstantin_chaos]

Hi luisgamino2,

Thank you for the nice words and the additional info about your issue.
The stuck bucket issue is something we've been struggling with for quite some time and there is still no good solution for it in V-Ray.
In unfortunately still happens in specific situation.

We have some ideas that might help us improve this in the future.
In the meantime I'd recommend you stick to progressive rendering.
In general you can expect slightly shorter render times with this sampling method which is even more noticeable with the GPU engine.

If you share an example test scene I'll give it a try and possible suggest something additional.

Thank you in advance,
Konstantin