Transform Scattering Scale

[Meelis]

Hi

Stupid question but how to i scale homogeneous volume scale?

I have reall world scene and scattering scale 0.002
It's around 20m

Now i have scene 0.132m, thats ~151 x smaller.
How to i scale the 0.002 value up for 151 x smaller scene for same look, just linearly like 0,002 x 151?

[jeanphi]

Hi,

Yes, the scattering net effect follows exp(-d*s) where d is the distance traveled and s is the scattering factor.

Jeanphi

[Pilchard123]

Is exp(p) equal to e^p?

[jeanphi]

Hi,

Well yes, I think that's how it is expressed in most (all?) computing languages and calc machines.

Jeanphi

[Pilchard123]

I think there's one or two that use exp(x,y) to mean x^y. Can't remember any off the top of my head though. Now I think of it, isn't LuxRender written in some C variety, so would probably use pow(x,y) for x^y...

[Meelis]

Thanks jeanphi and Pilchard123.