Vray GPU does crash a lot.

[oglu]

Is there any way to see why im crashing?
Its a hard crash to Desktop.

Vray 5.20.02
Maya 2022.2
Driver 511.79
Geforce 3060

[luisgamino2]

Hi oglu

It is happening the same with vray for sketchup 5.2, they need polish vray gpu light cache.

I use 5.1, since 5.2 takes a Lot of vram this is probably for the light cache calculated with gpu.

They need to work hard on this and leave out of core.

Light cache is so esencial with vray gpu, brute force + brute force is very slow and renders don't look correct.

I Hope for vray gpu 6 a real work on this subject, i don't want more Bugs, i don't want more unsupported features, we want stability and reliability.

Vray gpu 5.2 crash so heavy that some times i have to turn off My work station. But then You ask a college how things are going with vray... And they tell we are fine, vray is working Nice... But is not the same with vray gpu, lots of crashes is not a serius software. Really hope with vray 6 a total change about that.

Always i'm going to tell the truth to chaos group!!!
vray gpu came with vray 3.6... is time that You think in us...vray 6!!! Is more than 5 years!!!

I don't like how You treat us!!!

[Muhammed_Hamed]

Is there any way to see why im crashing?
Its a hard crash to Desktop.

Vray 5.20.02
Maya 2022.2
Driver 511.79
Geforce 3060

Hello,

Please downgrade to the recommended Nvidia drivers, the are at the top of the GPU page

Are you using ACES setup in Maya? do you change the IDTs while the IPR is running
I'm looking into this now

Best,
Muhammed

[Muhammed_Hamed]

It is happening the same with vray for sketchup 5.2, they need polish vray gpu light cache.

Out of memory crashes are different, in your case you know that your scenes are near the ceiling of your GPU memory in 5.1
After some optimizations we got them to work with 5.2 with the same hardware you have, so yeah 5.2 takes more memory than 5.1, it is a very small difference around 300 to 500 MBs in my testing
As said before, GPU LC is the way to move forward for V-Ray GPU. It is much faster than the older CPU implementation, we are preparing 2 new changes that make GPU LC even faster to calculate, it should be 2x to 3x faster

About supported features, to make this constructive please let me know which features are you missing in V-Ray GPU? we consider all requests adding to our roadmap, then we assign priorities based on how pressing the request is
And keep in mind that development takes time, we are working hard on optimizing memory management for V-Ray GPU. we have multiple developers working on that, whether it is texture compression or other improvements, this is near the top of our current priority list

And V-Ray GPU didn't come out with 3.6 , it is much older than that. I used it in production since around 2016 in many studios when I did concept design and Print/visualization

Best,
Muhammed

[luisgamino2]

Hi Muhhamed

One of the majors issues is the alpha channel, i do a Lot of interior rústics escenes ( with the use of Big glass Windows ) so when i composite renders don't look correct since there is imposible to use RE outside of the glass or inside of the glass for a exterior shot, speculars, reflections, etc don't look correct. ( Even if You choose in glass material reflection and refraction affect channels color+alpha or all channels) and is not only me a Lot of vray gpu users do Cars shots or trains shots or what ever scene that needs that support.

In the two sided material there is a button very important for a floor natural lamps, multiply by front diffuse ( only works with cpu, please bring a support for that) this gives a really Nice effects for a natural material as pergamine.( Natural materials are very important for designers and architecs)

Is there possible for bring a new kind of catmull roll for antialiasing??? I don't know about that subject or give support too for vray gpu.

I understand about photon caustics that there is really difficult task and is going to need a Lot of resources since the subject is a Big issue, but there are a lot of things that vray gpu can be improved. I don't regreat about that ( some investigations can begin about that subject at least)

A Lot of vray gpu users use natural materials, they look very different from artificial materials and also behaves different when is in touch with light as i already posted a photograph of a cushion in vray for sketchup forum, vray hair material and vray fur are very simple material there are more controls that maybe can work Nice with natural materials as wool, but we don't have it, please bring more controls about that, vray hair material is in a really básic setup and vray fur is the same at really básic point in vray for sketchup.

Thanks about the attention Muhammed, i believe that there is important that we contribute for a better and more proffesional software.

Thanks too for the work on light cache Muhhamed renders look Nice with light cache calculated with gpu and is faster than My cpu i7 8700k.

Vray gpu can be something really awesome!!!


Best regards, Luis Gamino

[oglu]

This scene is different. I need only 6gb vram. Its just 10 mio poly and basic shaders.

I cant backroll the driver cause of other software.
Is there a way to write the log into a text file?

[luisgamino2]

Hi Muhhamed

I spent some time to show You with images the Big difference in the two sided material the option " multiply by front diffuse"

Here are the examples, as You can see there is a Big difference using that button which is not supported by vray gpu.

The lamp doesnt has any kind of thickness, as two sided works.

First image is vray gpu with out multiply by front diffuse
Second image vray cpu with multiply by front diffuse checked

There is a visible difference... Second image with cpu gives a really amazing effects, the reflection on wall and floor are better and the lamp itself looks really Nice.

Vray gpu pergamine looks washed out, it needs more contrast it doesnt look right. It doesnt have the richness in colors and contrast that vray cpu has.

vray gpu "looks washed out"

vray cpu "multiply by front diffuse" looks really Nice

Thanks in advance

Vray gpu users and architecs we talk with images, as they express more than 1000 words.

this is kind the same material, but this is a photograph in real life, as You can see vray cpu looks more like this than vray gpu.
There is a Lot of details that i loose with out multiply by front diffuse with vray gpu.

[oglu]

Hi Luis how does this help with my issue?

[luisgamino2]

Hi oglu
I Want to be part of vray gpu, i know You use vray gpu maya, but we need to join forces to push the developers for a better software for all the comunity, sorry if it bothers You, but they only brought support from vray 4 to vray 5 the 2d displaccement to vray gpu ( Nice adittion)if we continúe like that, vray team is going to support everything for vray gpu until we reach vray 10, is taking years to support a Lot of things that they are really important.

I hope this posts help You in some ways, at the end of the time we speak the same leanguage... Vray gpu.

I hope You find a solution to your issues oglu, and sorry if it bothers You this comments.

[oglu]

I see. But its better to create your own thread and dont mix other stuff in here. Sorry

[Muhammed_Hamed]

This scene is different. I need only 6gb vram. Its just 10 mio poly and basic shaders.

I cant backroll the driver cause of other software.
Is there a way to write the log into a text file?

Hi Oglu,

I spent some time on testing this week, I got 2 issues logged with the IDTs and geometry changes. But honestly the IPR seems to be stable and reliable overall
Do you have any other apps running when you use the GPU IPR? Substance or Nuke?

Just in case, if you are able to reproduce something I will make sure it is fixed. Another option is to schedule a remote session to take a look at your Maya setup. Let me know what works for you

About the drivers, 511 will work fine if you restart your machine every few hours. The current performance issue happens after a while of using the machine(so will mostly affect people that keep their machines running for a long time)

Best,
Muhammed

[Muhammed_Hamed]

One of the majors issues is the alpha channel, i do a Lot of interior rústics escenes ( with the use of Big glass Windows ) so when i composite renders don't look correct since there is imposible to use RE outside of the glass or inside of the glass for a exterior shot, speculars, reflections, etc don't look correct. ( Even if You choose in glass material reflection and refraction affect channels color+alpha or all channels) and is not only me a Lot of vray gpu users do Cars shots or trains shots or what ever scene that needs that support

Hi Luis,

We have a fix now in the nightly builds, it is quite a big issue and took a lot of development time. Myself and QA are testing the fix before it makes it to the next update
I'm aware of this, and it is currently at the top of our priorities

In the two sided material there is a button very important for a floor natural lamps, multiply by front diffuse ( only works with cpu, please bring a support for that) this gives a really Nice effects for a natural material as pergamine.( Natural materials are very important for designers and architecs)

You can use the Thin-walled option in the V-Ray material, it should give the same result. It works on GPU now
Let me know if you need an example scene

Is there possible for bring a new kind of catmull roll for antialiasing??? I don't know about that subject or give support too for vray gpu.

If you mean the AA filters, that have a sharpening effect. I don't recommend this workflow, it is not needed and could lead to artifacts
In the frame buffer you can find Sharpening controls, it will give you what you want. Generally speaking the default Lanczos filter produces great results in V-Ray, you can use a big filtering size if you render big resolution
But don't completely disable this filtering, and don't use small values

I understand about photon caustics that there is really difficult task and is going to need a Lot of resources since the subject is a Big issue, but there are a lot of things that vray gpu can be improved. I don't regreat about that ( some investigations can begin about that subject at least)

I have this on the GPU roadmap, it is just that other tasks at hand now are higher priority. Things like texture compression you requested

please bring more controls about that, vray hair material is in a really básic setup and vray fur is the same at really básic point in vray for sketchup.

The SketchUp team is aware of your request, and put it on their roadmap. I believe you created a thread about that, please follow along with progress there

Thanks about the attention Muhammed, i believe that there is important that we contribute for a better and more proffesional software.

Your feedback and contribution are very welcome, thank you!

Thanks too for the work on light cache Muhhamed renders look Nice with light cache calculated with gpu and is faster than My cpu i7 8700k.

I'm glad to hear Luis, we have a developer working on that. He just pushed another performance improvement that makes GPU LC 2-3 times faster to calculate. This new improvement didn't make it yet to SketchUp, it will be part of the next hotfix
We also plan to take another look at the memory consumption for GPU LC soon, to try and optimize memory usage if possible

And sorry about hijacking your thread oglu
Please make a separate thread for your feedback Luis , it will be easier to follow on that. And to not spam others with notifications.

Thank you and have a great day!

Best,
Muhammed

[oglu]

I moved to a new project. If i get into troubles again i make sure to create a repro scene.

[Muhammed_Hamed]

Thank you!
I will spend more time this week using Maya's IPR for more testing

Best,
Muhammed