Pre23 v4 - not understanding lamp shade test

[watchyour6]

Lamp with bulb (emitter) and a mirror to help see addition perspective.

The inside of the lamp shade is not lit, for both path tracing and direct lighting renders.

Resolution: 1024x768 at 2000 samples, for both renders.

[MaTtY631990]

Are you trying to achieve the look of a proper lamp shade.

[watchyour6]

Yes. Simple enough, but I must be doing something wrong.

I've attached the ocs file.

[MaTtY631990]

Heres a workflow, In the graph editor make a diffuse material and connect to your lamp shade and then make a RGB spectrum texture and connect to the transmission controller on diffuse material and set to pure white. You can only see the real effect in pathtracing.

[watchyour6]

Thanks for the workflow tip. I'm still not getting a different result. Could you post an example illustrating the node setup and also the result rendered via pathtracing?

[MaTtY631990]

So the output is from RGB spectrum is connected to input on transmission controller, and the diffuse material is connected to your model replacing the lamp shade material that was their, and leave the colour set to default and change transmission colour to white. Set your rendering kernal to pathtracing and this is result you should end up with.

[watchyour6]

Much better! Thanks again for the tutorial!

[p3taoctane]

Thanks for the tip.
But how did you create that RGB spectrum node?
I do a right click Add and can't find that anywhere
Thanks

Peter

[matej]

add -> textures -> colours -> RGBspectrum

[p3taoctane]

Perfecto... thanks... there are hidden gems I have yet to find

Peter