[Micha]

This was your chance.

[Mihai]

But then it makes me wonder, if a photon travels perpendicular to a surface, through vacuum, then you can put that surface at any distance, that photon will have the same energy...

[Micha]

Why not? Your problem will be to find a single photon, most you get more than one and this group distribute with the distance.

[Thomas An.]

But then it makes me wonder, if a photon travels perpendicular to a surface, through vacuum, then you can put that surface at any distance, that photon will have the same energy...

[John Keates]

He he. That is the picture I was talking about. See how it all becomes clear now?

A picture tells a thousand words.

The 1/sqr is universal because it is caused by this very simple principle.

Obviously, where there is a scattering medium the rlationship changes as the light stands more chance of ending up going wonky the further it goes. This is why sss is very dependent on scaling (small things look more transparent).

[Mihai]

Yeah Thomas, I understood even without the illustration

I was just wondering if some photons (those almost perpendicular to a surface) would not loose their energy at all. I guess it must be so.

[Micha]

Stupid question: can a photon loose energy or is it a constant quantum?

[3dtrialpractice]

EDIT.

yes, sorry. It would be great for that to be in all 1 shader!

PS,

as a expensive workaround this was posted as a car shader attempt, nice but dialetic makmes it an expensive render.

Looks gorgoues tough!

[quote="daros"]Hi,
This is my metallic car paint test. The model is a bit simple.
I modeled the metallic surface and then the transparent paint surface as a 1 mm thick object using the smoothshift function in Lw. The transaparent paint object has opposite normal direction. the inner transparent paint object surface has an 0.2 mm offset distance from the metallic object.
It works... rendering is much slower.
Rendered on RemoteMatador in 5 minutes using Maxwell 1.33.





David Rossmann

[mverta]

You didn't understand my post.

My mention of the Fresnel effect wasn't to say that Maxwell couldn't do it, but that I had used it as part of a camera normal lookup table to control a ramp color gradient, and Maxwell couldn't do that effect. Yet.

_Mike