You could say "Refractive index per color channel. This is the real part of a complex refractive index, scientifically denoted as n".
This description does not give more information than the title. We could say "Models for describing metal appearance, by specifying the apparent color or the physical IOR.
Looking at Inputs in hair_principled.rst, I think it's preferable to have subsections like Common, F82 Tint, and Physical Conductor, instead of mixing all the inputs.
There is a WARNING: Title overline too short. I believe these ***** should be as long as the title itself.
Similar here, I would prefer "Extinction coefficients per color channel. This is the imaginary part of a complex refractive index, scientifically denoted as k".
What is your expected behaviour here? For volume we expect an enclosed mesh, I don't think we can seriously support a volume that is inside out.
What's happening here is that the ray does…
@Alaska why is Cycles tagged?
BTW I get Warning: Light probes volume pool could not be allocated. Now using a pool of 512 MB.
@Michael-Jones Could you offer some insight into this error message? The message doesn't only appear with large scenes, and it does not seem very informative to me.
The IOR only controls specular and transmission layer, it does not control the metallic layer. Please refer to the [manual](https://docs.blender.org/manual/en/4.0/render/shader_nodes/shader/princip…
Actually I can still reproduce in 4.3, but it seems to have gone with 6da42e9c95. cc @fclem