Do any of you do other work while rendering?

[Vizioen]

My understanding is, it is an OS thing and not a V-Ray thing. I posted some escalated CMD code, which solved my issue. If you search Freeze, you should be able to find it.

I read all of the threads concerning this, but what I understood from them is that you basically tell Vray / 3dsMAX not to use all the cores? Or I completely misunderstood in that case I'd have to give that code a try.

[Muhammed_Hamed]

however i meant more in the sense of a drop down menu/ button option just for ease of use

+1
In Modo and Maya there is options to control this in UI

[OPEN_RANGE]

I'm interested in setting up my system as discussed above, but not sure about a few things

I have a Core i7-6950X 20 core CPU. I have not yet used CPU rendering, only using GPU rendering for now.

How many cores would be suggested to remove from rendering in order to have reasonable performance in other apps like Pshop, (as discussed above), while simultaneously rendering in max/vray?

If I wanted to use 4 cores for other apps would I run the first line of code
set /a CORE_COUNT=%NUMBER_OF_PROCESSORS%-1

Then enter the number of cores I have which is 20?

Then run the second line of code
setx /M VRAY_NUM_THREADS %CORE_COUNT%

Then enter 16?

How would I go about reversing the changes/reverting back to the current state if needed?

[rudolfb]

I'm interested in setting up my system as discussed above, but not sure about a few things

I have a Core i7-6950X 20 core CPU. I have not yet used CPU rendering, only using GPU rendering for now.

How many cores would be suggested to remove from rendering in order to have reasonable performance in other apps like Pshop, (as discussed above), while simultaneously rendering in max/vray?

If I wanted to use 4 cores for other apps would I run the first line of code
set /a CORE_COUNT=%NUMBER_OF_PROCESSORS%-1

Then enter the number of cores I have which is 20?

Then run the second line of code
setx /M VRAY_NUM_THREADS %CORE_COUNT%

Then enter 16?

How would I go about reversing the changes/reverting back to the current state if needed?

Well I imagine you would have to enter 12 cores because as far as I am aware you tend to do these kind of things by the amount of physical cores rather than logical. I may be way off though.

[yavor.rubenov]

I'm interested in setting up my system as discussed above, but not sure about a few things

I have a Core i7-6950X 20 core CPU. I have not yet used CPU rendering, only using GPU rendering for now.

How many cores would be suggested to remove from rendering in order to have reasonable performance in other apps like Pshop, (as discussed above), while simultaneously rendering in max/vray?

If I wanted to use 4 cores for other apps would I run the first line of code
set /a CORE_COUNT=%NUMBER_OF_PROCESSORS%-1

Then enter the number of cores I have which is 20?

Then run the second line of code
setx /M VRAY_NUM_THREADS %CORE_COUNT%

Then enter 16?

How would I go about reversing the changes/reverting back to the current state if needed?

If you do only GPU rendering then you CPU should already have enough cores free. If you are not experiencing any freezes then you don't need to set any variables. By the way when rendering with GPUs do you have one dedicated GPU for your display ?

Now for the variables.
The first line sets a temporary variable to the total number of threads available in your machine -1. The next line sets the variable for V-Ray to the value we've set on the previous line.
Best would be if you start with the total threads -1 and see if it works. If you still get freezes - change it to -2 and so on.
To reverse the changes - you only need to remove the environment variable.
Also keep in mind that after setting new values/removing the variable you have to restart Max/V-Ray.

[samuel_bubat]

I`ve wandered into the 2019 Vray render freeze. I never had it with 3.6 nightlies before but recently I updated my pc from a Quadro 4000 to a 1070ti and in 2019 with 3.6 nightly the freeze was ridiculous, completely unusable. I`m still on Win7 and I always set 3dsmax to low priority in Task Manager but that wasn`t enough, I also had to tick Low Priority in Vray as well which fixed it enough to not freeze, something I didn`t have to do in Vray 3.4. I`m not putting my Quadro back in just to test but I wonder if changing my GPU had any impact or if something else in the more recent 3.6 nightlies has changed because it never froze before with earlier 3.6 nightlies and my old Quadro card ?

We ran into the same problem and the only real fix for us was the setting the QT_OPENGL variable as explained here.
https://forums.chaosgroup.com/forum/...fb-hangs/page6
For us the low thread priority solution only worked for certain scenes.

Regarding working while rendering. I did in the way that I had one max open for DR rendering where I unchecked "use local host" and another max for working. We recently switched from 2014/Vray3.5 to 2019/Vray3.6.
Now with 2019 it seems to be impossible to work on a second max instances as max becomes very laggy when having more than one instance open. With 2014 you could have as much max instances open as you wanted without a problem as long as you didn' t blow the memory.

[OPEN_RANGE]

If you do only GPU rendering then you CPU should already have enough cores free. If you are not experiencing any freezes then you don't need to set any variables. By the way when rendering with GPUs do you have one dedicated GPU for your display?.

Oh man I am sorry. I meant I only use CPU rendering currently and have not yet implemented GPU. Typo/ brain cramp....my bad.