V-Ray Next Questions / Cryptomatte

[sdelalla]

Hello,

I was reading the article on CG Channel about V-Ray Next.

http://www.cgchannel.com/2018/05/cha...-of-rendering/

A line that caught my eye was: "Part of that was getting rid of [legacy code], like the old adaptive sampler. It was left in 3.x, in case someone needed it to be compatible with an old scene, but there’s only the newer variance-based sampler in Next." And brought up some questions:

Currently we utilize cryptomatte, which is Bucket sampler only, and every scene is currently setup with the bucket sampler. How will this work when we upgrade to V-Ray next if this disappears?

Are there plans to have cryptomatte work with the progressive sampler or new variance based sampler?

Maybe this is a dumb question but is the new variance based sampler the same thing as the progressive sampler?

Thank you for the help with this!

[Mihail.Djurev]

Previously, we had two bucket samplers, Adaptive DMC and Adaptive subdivision. We removed the Adaptive subdivision sampler from the UI a while ago, and renamed the option "Bucket".
In other words, this change doesn't really concern you. You still have the bucket/progressive option.
Also, the variance based sampling is used both with the bucket and progressive samplers. The old sampling method was removed from the code.
We are doing research on supporting cryptomatte in progressive mode.

[vlado]

Maybe this is a dumb question but is the new variance based sampler the same thing as the progressive sampler?

It's not really new, it's been in the 3.x builds since forever, so you are already using it. Don't worry about it, nothing is going to break in your workflow with V-Ray Next. As Mihail noted, Cryptomatte for progressive mode is being researched right now.

Best regards,
Vlado

[sdelalla]

Perfect, thank you for the info guys.