Absorption Layer Transmittance

[galinette]

Dear all,

Do you have a documentation where this is explained? It looks interesting!

Etienne

[CTZn]

Hi galinette, in advance sorry I'm not answering directly to your question. Emergency answer, rather

As Ono said recently, its simply multiplying the light entering the medium. Not sure but it might be clamped to 1.0, so it's essentially dimming incoming light.

Use an almost/mostly white noise map to simulate dirt on glass.

This parameter is not affecting the medium definition itself.

[galinette]

OK. So basically, you keep the reflectance coefficient as it was before , and you multiply the transmittance by (1-absorbance). Am I right?

And just to provide you some motivation, if you implement the thing I asked a few days ago (tabulated R & T data vs AngleOfIncidence & wavelength) we should be able to provide you some materials matching architecture LowE & solar control coated glass (As well as real dichroic, coloured interferential coatings, and so on)

Etienne

[CTZn]

OK. So basically, you keep the reflectance coefficient as it was before , and you multiply the transmittance by (1-absorbance). Am I right?

I have to suppose that you made the correct assumption galinette... however, due to the precision of the answer you need I would not take the responsability on me...

The new 'absorption layer transmittance' specular material parameter [...] only acts as a multiplier on the transmitted light (e.g. on the transmission coefficient).
So it doesn't affect the reflection coefficient at all.

I guess you remember that quote, it was for you

[galinette]

Oops... My memory fails!

Etienne

[CTZn]

Let's not talk about mine

I must say that I'm following very closely the topics you've created, Etienne, and I guess they hit their target: I did not often see OnoSendai qualify a request of "very interesting" ...

Until now I want to second them all.