VRayCryptomatte problem

[DCHA34]

Hi,
My sample scene consists of 2 cubes (Box001 and Box002). The 2 cubes have the same material.

I'm creating two Cryptomatte Rendering Elements :
- one with ID Type = Node Material Name
- one with ID Type = Node Name
The 2 RE are named "VRayCryptomatte" (by default). This is important.



I run the renderer and get 2 different RE. All is ok.



Now the problem:
In the VFB, I take the exposure for example, the 2 Cryptomatte RE are indeed present,



BUT, whether I choose one or the other, only the last RE at the bottom of the list (1st image, the highlighted RE, in our case Node Name) is taken into account.


The bug occurs if the 2 render Elements have the same name.
If I name the 2 render Elements differently, then it works correctly.


I hope I've made myself clear.

[vladimir_krastev]

Hi, thanks for posting.

The 2 RE are named "VRayCryptomatte" (by default). This is important.

Why is this necessary. I can't imagine a scenario where two different render elements with the same name is a good workflow.

[DCHA34]

Misinterpretation of what I wrote.
I wrote that it was important because it was the fact that they had the same name that was causing the bug.
Of course I don't need them to have the same name.

[roysgi]

You can change the name of each of them and then distinguish what each one is - see attachment

[vladimir_krastev]

Hi,

Of course I don't need them to have the same name.

Please use proper naming to all elements of your scene. This is the correct workflow.