Transmittance to Transmissivity

Hi all,

i have just noticed this funny thing when i create a new RAD material…

As you can see from the following image, even if my input for RGB is 0.719335202, the RAD material present 0.784.

Do you know why?

Thanks a lot in advance


The input values are transmittance values however radiance uses transmissivity values (output). The component converts transmittance values to transmissivity and that’s why you see different values in input versus output.

Ah, ok! Right!

Thanks a lot!!! I was already putting the values of the transmissivity!

Thanks for the super quick response