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today I began to set up more complex light composed of 5 or more groups and encountered difficulties light settings . as better and set the right light in the interior ?
fine-tune the brightness of the light is lost ... setting of individual groups take turns to anything good does not .

2..
2 question . I was faced with the fact that I have different world pictures . when rendering the light to one group and then mixed in photoshop turns completely different light saturation in contrast to the images in octane render

Hi Goldisart,
for multipass compositing you have to save each single pass in linear 32bit (.exr) and use linear (add) to compose the render.
attached a screenshot about it.
Regards
Paride

Yes, thank you . ! when a render pass, then all is well. but if the scene is big and the lights I can't turn off the light from the composition - because it will change the balance of light... the Light should always be active in the scene when setting up lighting groups. But if the graphics card is weak for example it is very long . To balance the light turning off group OFF impossible since changing the brightness of other light sources. What to do in this case ?

as a quicker option is to use Clay mode but this does not work the passage of light through the glass

+the cube is closed and accordingly the lights there shall not pass but the light source outside the cube acts on it

I think you need to raise this issue .. the light is not balanced...

as an option to make the button auto sampling rate for all light sources in the scene

+ where is the shadow ? top

+I think I'm going crazy

now I do understand that you have a fatal error in light of

when using light sources of emission material, this effect disappears when visible to camera

Hi Goldisart:
1 to correct lights balance in the render, Octane's strength is the real-time render, and in the words of an old advertising: for a large wall it takes a big brush..
2 in your scene, there are 121 lights with 100,000 watts each.
A test, I think, not very useful.
That said, a light out of the room for octane does not mean a light off to consider when calculating the render.
However, if you want this kind of test, to reduce noise inside the room,
you should increase sample light at least until 1000 (inside the room) and reduce to 0 the other lights (outside the room).
3 About the artifacts with shadows and lights, it depends on the use of Octane light that do not allow at this time to use the opacity parameter.
I personally recommend using the most versatile emitter mesh instead of Octane Light.
Regards
Paride