Option to set RT GPU as production renderer? Option to select videocards?

[afecelis]

Hi everyone,

As the topic reads, in 3ds max you can select which renderer you're going to be using for final rendering and among the engines available there's Vray RT GPU. In Modo you get the "Render with the V-ray renderer" option for production rendering and the V-ray RT CPU/GPU Cuda options for working interactively. Is there a way to work with RT GPU as production renderer? Instead of RT GPU being a progressive renderer, can it be setup to render a certain amount of samples (till the image is clean) so it can be used for rendering animation frames? Also, if you got more than one nvidia GPU, where is the option to select which cards to use for GPU rendering?

thanks a lot.

regards,
Alvaro

[vladimir.nedev]

Is there a way to work with RT GPU as production renderer? Instead of RT GPU being a progressive renderer, can it be setup to render a certain amount of samples (till the image is clean) so it can be used for rendering animation frames?

You can use V-Ray GPU for rendering animations through the Render with V-Ray Standalone command. It has the option to select the render engine. See attached image.
Docs page here : https://docs.chaosgroup.com/display/...Ray+Standalone

Also, if you got more than one nvidia GPU, where is the option to select which cards to use for GPU rendering?

This is not available directly in the MODO UI, but you can do it using an external tool installed with V-Ray for MODO.
It's called Select OpenCL devices for V-Ray RT ( I know the name is confusing ). You need to run this tool as an administrator. See attached image.
More info from the docs : https://docs.chaosgroup.com/display/.../GPU+Rendering

Greetings,
Vladimir Nedev

[afecelis]

Thank youuuuuuuuuu Vlad!

This is wonderful info. Testing both things right away.

regards,

Alvaro

Edit: One last question. When using Vray standalone, is the light cache for secondary GI option enabled in the regular GI options? (secondary engine)

[vladimir.nedev]

One last question. When using Vray standalone, is the light cache for secondary GI option enabled in the regular GI options? (secondary engine)

Yes, for both CPU and GPU rendering.

Greetings,
Vladimir Nedev

[andycf]

Just a query, is it normal for V-Ray Standalone to not exactly match the renders from V-Ray in Modo? (Using the same engine of course, GPU in this case.)

Am I right in thinking that because it is rendered outside of Modo (converted to a .vrscene and sent to the Standalone) some Modo-specific features aren't there to convert depending on how the scene has been set up?

(I decided to try the 'Render in V-Ray Standalone' option as I wanted to render an image out overnight, but wanted the actual render to finish rather than having the computer on all night, and while the results are very close, the render from the standalone is warmer, in the whites especially. Could I use the Max render time in the RT settings of this in future?)

[vladimir.nedev]

Just a query, is it normal for V-Ray Standalone to not exactly match the renders from V-Ray in Modo? (Using the same engine of course, GPU in this case.)

No, it's not normal, they should match.

Am I right in thinking that because it is rendered outside of Modo (converted to a .vrscene and sent to the Standalone) some Modo-specific features aren't there to convert depending on how the scene has been set up?

No, all features are converted the same way, it doesn't matter if you render inside MODO or using V-Ray Standalone.

and while the results are very close, the render from the standalone is warmer, in the whites especially.

Maybe you setup some color corrections in the VFB in MODO ? These are not part of the .vrscene, so you need to manually save them from the VFB in MODO and apply them to the VFB in the V-Ray Standalone.

Could I use the Max render time in the RT settings of this in future?

You have to specify the max render times / passes / noise threshold in the "Render with V-Ray Standalone" command itself.

Greetings,
Vladimir Nedev