multi-pass rendering how?

[akiefer]

Hi,

I need to render out the same passes that you can do as in c4d's multi-passes. I have seen this option in the VRay render tab in the effects tab under multi pass. But when I activate them and render them nothing is rendered/ saved in the render view.

How can I activate this?

Albert

[Robert G]

Hi Albert,

I don't think this option is active already.
I think we need to wait for an update.
At least that's how I understand it.

Regards, Robert

[RenatoT]

Hello Akiefer,

there is a preliminary Multipass support, just add primary buffers in the c4d multipass.

I'm working on the custom vray multipass right now.. so in the next update, 1.1 will be there.

Cheers
Renato

[akiefer]

Hello Stefan

What do you mean by primary buffers? I have not seen that specific option in the multpass dialog of cinema. I just added some channels but when I pressed render Cinema crashed...

Albert

[noseman]

I think that "primary buffers" are the multipass object buffers (I think)
but it doesn't work with VRAY.
I did a simple scene with 2 objects and added C4D compositing tags with object buffer 1 and 2 (for the 2 objects)
Enabled multipass and added the objects buffer 1 and 2 as passes
it renders the image but doesn't render the object masks.
If I turn off Vray, it renders normally with alphas.

[akiefer]

I have devised a temporary solution and made a stand-in scene file where I give objects a full flat color (100% luminance) and that way I can select specific areas very fast. Since VRay renders these 'mask' scenes blindingly fast (just turn GI off) this is quite a good temp solution...

Albert

[stefan]

the base channels of multipass are supported.
we add a deticated pannel in one of next updates to add also all vray specific channels.

cheers
stefan

[rendertaxi]

the base channels of multipass are supported.


which multipass channels are supported exactly? can you name them please?
when i enable multipassrendering and add the image channels to be rendered , vray crashes after calculating LC and IR.

thanks, alex

[MikeS369]

the base channels of multipass are supported.


which multipass channels are supported exactly? can you name them please?
when i enable multipassrendering and add the image channels to be rendered , vray crashes after calculating LC and IR.

thanks, alex

I believe it is the "Ambient" channel that is crashing C4D. At least it was for me.

[RenatoT]

Hello,

i'm sorry but the true multipass is in progress....

Ambient is not supported in Vray.

VFB_COLOR
VFB_DIFFUSE
VFB_SPECULAR
VFB_SHADOW
VFB_REFLECT
VFB_REFRACT
VFB_GI
VFB_CAUSTICS

This is the list of the currently supported.

Sorry for now
Renato

[rendertaxi]

thanks anyway renato!

waiting for the update.. and till then it´s better to have some passes than none. :-)

regards, alex

[t43]

hi first post,

superb work all the vray team thanks alot....

how about a z buffer or depth channel,anyway to get something like that with the current version....

:idea:

[RenatoT]

Hello :)

The Depth will be added.. require some testing and parameters so i'll remove for now.

Sorry
Renato

[t43]

do you think it would be possible to us AR´s Depth Chanel in combination with the vray image,given it´s the same camera? for the later use in a layerd after effects project? :shock:

[RenatoT]

Sure :)

Also object buffer can be used ... the pixels must be same.

Cheers
Renato

[Ernest Burden]

You can also fake a depth pass with a copy of your file with all mats turned to white, and black fog. Its best to render to 16 or 32 bits. One advantage of this is you can render with transparency/reflections/refractions in depth--try it!

[t43]

cewl,
thanks for the hint,i need the depth pass to ad some depth of field later on in post process,will try out the method you described.i have to render 7500 frames total so the guy from the post told me in order to save time, to give him an extra depth pass so he can take care of the dof/focus stuff.thanks to vray i get incredible fast render times,so i guess i can afford the extra depth run in AR.
8)

[RenatoT]

Hello :)

I'm sure that AR will render fast too your 7500 frames :)

[Ernest Burden]

cewl,
thanks for the hint,i need the depth pass to ad some depth of field later on in post process,will try out the method you described.

Obviously AR has a depth pass of its own, so that would be fastest. The method I mentioned requires raytracing, so it would not be as fast, but no lights or GI are used, so it should be fairly quick--but look better (at least different) than a regular depth pass because of respecting glassy objects.

[t43]

i will have to go for the standart depth pass,but i never thought about the "black fog" approach, so i will give it a try in another scene
:!:

[t43]

okay,another multipass question,apart from the depth channel i will have to render the "motion-vektor" pass...will this option be available in a future release?i guess there is something called "velocity pass" in max is that feature already available in vray for max?

[Jan]

Hi Renato, Hi stefan

I am really looking forward to the multipass option, and I beg you not to make the mistake that cebas did with FR!
There is a Multipass option in FR (render elemnts), the implementation sucks though,... cause it is absoluty user unfrendly since once they are turned on they will write a file to the assigned Pass. This is even true for testrenderings in the editor.
The results of this `habit´ is that the chances to ovrwrite a previously rendered scene by simply doing testrendrings get quite high, since there is not even a warning message! (Same accounts for prepasses in FR as well...) telling cebas this `bug´, they named it a feature....
To sum it up: because of this habit we are not using the multipass option since it is far to dangerous in a production enviroment...

later jan