objects get secondary light but have no lightLinker connection

[BurkhardRammner]

So, here`s the next lightLinker related weird behavior:

I have objects which do NOT get light from a light ( no lightLinker.link connection and for test purpose a lightIngore connection).

And I have objects which ARE connected the the lightLinker.link attribute. Those objects are correctly lit.

But!

The objects which should not be lit are lit by secondary light rays of the lit objects.

So, is this by design?

Can I somehow prevent the objects which should not be lit from getting some light?

thanks for help!

(renderer: arnold)

[mspeer · Accepted solution]

Hi!

"So, is this by design?"

- Yes. There will be some rays shoot out from the object to check for light. Some will hit a light which can be ignored when the light is not linked and some will hit a surface (diffuse lighting), but there is no information where this light comes from.

"Can I somehow prevent the objects which should not be lit from getting some light?"

To prevent light on a certain object, incl. diffuse lighting, you can use

a) an other shader like aiFlat,

b) disabling diffuse lighting in Render Settings or per light, or

c) AOVs + Render Layers, to control this in post.

...

[BurkhardRammner]

thank you, @mspeer

setting the individual lightShape 'indirect' attribute to zero was it!  : )