RT gpu and multimatte?!

[super gnu]

does it not work? my first proper job in rt gpu, and my multimattes are blank.

[vlado]

It's supposed to work, yes - at least it does here. If it doesn't, can you post a scene?

Best regards,
Vlado

[super gnu]

ok just to note (i should have mentioned) that this is with the latest nightly from yesterday.. installed to test the denoiser. if i switch to production renderer, the multimattes work as expected.

[kosso_olli]

Also, RT can not generate multimattes based on materal id in multisub materials. Minor thing I came across recently.

[super gnu]

ahhh! thats it.. i was using exactly that combination ( as i nearly always do, so not such a minor thing for me :P )

[vlado]

Yes, will work on implementing that, it shouldn't be too hard.

Best regards,
Vlado

[allemyr]

Hi!

I'am trying to get multimatte to work with my simple scene. I use Vray RT GPU as production render 3.40.02.
Multimatte renders black what ever I try, in standard Vray ADV it works fine. I've read that it works best with Material ID with GPU but I can't get it to work.
I've also read that it doesn't work with multisubobject texture yet. This will be a super cool feuture when it's fully availible with multimattes sweet antialiasing ofcourse.
Have some one get som nice result with multimatte render element and Vray GPU?

Best regards!

/ Karl Allemyr

[matanov]

Hi!

I'am trying to get multimatte to work with my simple scene. I use Vray RT GPU as production render 3.40.02.
Multimatte renders black what ever I try, in standard Vray ADV it works fine. I've read that it works best with Material ID with GPU but I can't get it to work.
I've also read that it doesn't work with multisubobject texture yet. This will be a super cool feuture when it's fully availible with multimattes sweet antialiasing ofcourse.
Have some one get som nice result with multimatte render element and Vray GPU?

Best regards!

/ Karl Allemyr

Have you checked the "isMATID" option in the MultiMatteElement ?

[savage309]

Also make sure to choose the material id from here, not from the V-Ray material UI field ... for some reason it still doesn't work in RT, we will have to look at it.

[allemyr]

Thank you very much for your support! I read about this ID box in the documentation but couldn't find it in the material editor interface.
Now it works for me!


Super cool, thanks!