Re: Refection in the RayShade renderer

[Jose' C. <cru...@ce...>]

Il giorno 28/apr/07, alle ore 12:15, Roger Holmes ha scritto:

> Are you saying the more reflective one on the left is matt and the =20
> less reflective one on the right is glossy?
> If so our program has had its controls labelled back to front for =20
> many years. Interesting!


keep aside the fact that my english is limited, so certain details of =20=

the adjectives can be misunderstanding...

#define "wheat flour" matte
#define "car paint" glossy

with these definitions the right torus is glossy and the left one is =20
matte

another aspect is which one cast more light in the direction of the =20
observer
in this case a matte object is more "brilliant" because it's rough =20
surface reflect light in every direction, while a glossy object =20
reflects the light in just one

in a limit case, a perfect mirror in a black space is invisible =20
except in the direction where the light is reflected


so in my opinion one thing is the amount of light reflected, and =20
another is how mirror-like is an object

so the "sugar coated donut" in the left, can't reflect the objects =20
around it, even if it is more bright, while I expect to see the =20
objects around the right torus reflected on it

you can see a discussion at:

<http://www.artifice.com/support/user_guide/documents/tips/=20
specularity.html>



Pax et Bonum

# Dott. Jos=E9 Cruanyes Aguilar  -  C.E. Soft srl
#  Pzza. Firenze,4 MILANO  -  XX Settembre 10, CREMONA
#   02,3923101                0372,460602