Layers pbs when culling with 2 cameras

Hi guys,

not sure it's the right place for this, but here it is :
I have 2 cameras, each rendering one different canvas (one in a rendering texture):
Say, canvas1 with layer1 and canvas2 with layer2.
But I want that some children objects of canvas1 to be rendered in cam2, so I set those objects layer to layer2.

But it does not work, layer2 objects of canvas1(layer1) are still rendered in cam1, not cam2.
Is it a bug or something I missed?
Is there some workaround to this problem?

Thanks!

 

Ok, I found a (the) solution to this particular pb, for those having the same problem :
The children of Canvas1 with Layer2 must ALSO have a canvas component attached to them. This way, these children (and their children too) will be properly rendered on Camera2.

 

Ok,
That solution works but only with a world camera, not with a screenspace camera.
If someone has a solution for screenspace camera...