VRay GPU Next Update 1 - Bucket mode Problems

[gaara the nightmare]

Hi,
I've made some test with the new bucket mode with VRay GPU on Update 1, it seems to not work on 3dsmax 2017 SP3.
The VFB stays black and finish in a second. No warning or any error on the log.
I've also tried it on 3dsmax 2015 and 3dsmax 2019 and it seems to work perfectly on these two versions.

Someone else got the same problem with 3dsmax 2017 ?

[matanov]

Hi,

Working fine here - can you get me a scene?

[gaara the nightmare]

Hi Slizer,

Here is a link with a very simple scene:
https://we.tl/t-WsIJEDKG5R

Let me know if you find something weird.

[yavor.rubenov]

Hello,

I tested the scene here and it is rendering fine here. There are some strange settings in the scene that are not optimal for V-Ray GPU and are not exposed at all in the user interface:
- your buckets division method is set to count instead of size (if it was the regular V-Ray - this is in Settings->System->Division method)
- your lights are set to "Uniform probabilistic" instead of Adaptive

Both options are only accessible through MAXScript for V-Ray GPU. Is there any specific reason they are changed (maybe some old preset).
You can restore them with the following lines of MAXScript:

renderers.current.V_Ray_settings.system_region_meaning=0

and:

renderers.current.V_Ray_settings.options_probabilisticLights=2

Could you try if anything changes when you set those values ?

Best regards,
Yavor

[gaara the nightmare]

Hi Yavor,

Thank you for your help, now it is working fine after using your two lines of code.
There is no particular reason why these settings was like this.
I've saved some time ago a default preset for using VRay GPU at startup of 3dsmax, the mistake probably moved along when I was updating new to versions of VRay.

Thanks for the fast reply !

[yavor.rubenov]

You are welcome

You can create an empty scene with V-Ray GPU as the renderer, execute the two lines and resave the preset to have the new values.
Most probably the problem was the bucket setting - we'll add a fix so that this works correctly even with the other setting.