MaterialID or ObjectID - a little precise how to please! Tweet

[dnsfactory]

Hi all,

currently we are rendering many automotive stills and short sequences.
to finetune the very large renderings it would be nice to render out an
objectID or materialID pass. my passes all shows red in red in red. no other
color

so please a little how-to on:

HOW TO ASSIGN MAT OR OBJECTID IN MAYA
AND RENDER IT OUT WITH OCTANE?

thank you very much.

[dnsfactory]

SOLVED!

everything works fine now with the brand new Maya-Octane-Plugin-Release

[maverickpixel]

any chance you want to reveal how it was fixed?

[calus]

any chance you want to reveal how it was fixed?

The MaterialID pass works out of the box.

The ObjectID pass, on the other hand, doesn't make any sense , it has a very convoluted usage.


To make it work, you have to :

For all shapes in the scene, change the "octane:geometry type" to something else than "global".

For all shapes in the scene, change the "octane:layer ID" to "2".

In render settings/render layers/ enable "enable layer" and put "active layer ID" to "2".

Obviously to see the pass you have to enable it and choose it in "preview pass".


Yes object ID pass have nothing to do with octane render layers but that's the awkward Maya way ,
also the render layer ID 1 is reserved for "Global" geometry type.

Actually, everything in the Maya plugin promote the use of the "Global" geometry type,
which can make sense, if you render still picture and don't need any of the Octane advanced features, it renders quicker.
But for the Maya plugin, this was really a poor choice from Jimstar ,
as Maya is a sophisticated animation software, this use case is uncommon and makes usual Maya workflows extremely convoluted with Octane...

I guess this is going to change with one of the next Kai's release, with the new "geometry collector" system.

[blackshore]

@Jimstar, @k.a.schubert

I tried to extract a ID pass as in Octane. But it seems that I'm unable to edit\add a value.
In Vray it looks like this:


One sets a value and once it renders it contains extra metadata in the exr file.
In post one then can mask out objects by simply changing the id number:


There is no extra meta data in the exr files from octane as I'm aware of.
Can this be done using any extra attributs similar to MR?
Or are you able to add if it is currently non existent?

[calus]

I think that's not possible because Octane ID pass are not true ID pass, they are color pass not integer, so can't be used as expected out of the box.

You should ask for true ID pass in the Standalone section.

[blackshore]

Hopefully it's not that hard to add.