Light linking and aiStandIn (Alembic)

[ruchitinnewfushion]

Hi, can I get more information on how to manage light linking with aiStandIn(Alembic) & operators workflow ?

Maya 2019.1

MTOA 3.2.2

Thanks

[ruchitinnewfushion]

is it possible to control or not ??

[e.bairaktaris960]

Did you manage to find any information about it?

[Stephen.Blair]

Are you using MtoA 3.2.2 ?

[e.bairaktaris960]

Hello Stephen, I am using 4.0.0. and 4.2.1 I just thought to ask before I open a new topic.

[Stephen.Blair]

With newer versions of Arnold, you can use these assignments with a Set Parameter operator:

use_light_group = true
light_group = ['green_lightShape' 'ground_lightShape']

[e.bairaktaris960]

Thanks for your reply. Unfortunately, I couldn't make it work. Could you please elaborate a bit further? Where do I have to write this? I tried with a light_group assignment but I guess I did it wrong.

[Stephen.Blair]

You use an operator. That's what you have to assign to whatever you select

[nurrutiaNVHQ6]

can you be more specific on how to add this operator?

[Stephen.Blair]

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@nurrutiaNVHQ6 wrote:

can you be more specific on how to add this operator?

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You use the Attribute Editor for an aiStandIn node.

https://docs.arnoldrenderer.com/display/A5AFMUG/Stand-ins#Standins-FileContents

[nurrutiaNVHQ6]

And its possible to light link a particular mesh inside a standin?

[Stephen.Blair]

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@nurrutiaNVHQ6 wrote:
And its possible to light link a particular mesh inside a standin?

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That's what the File Contents box is for.
You select an object, create a set parameter operator, and set the light link values

You'll need to use the names of the lights as they appear in an exported ass file.