Viz 4 materials tutorial

[rachel]

jan ray Brookes has written an excellent tutorial about Viz 4.0 Global illumination. This tutorial has help me loads in my understanding of radiosity with viz . However, I was wondering if someone could explain me a bit further how materials work with radiodiosity in a bit more depth please? and also, where can i find a good librairy of materials?

Many thanks,

rachel

[ferox]

I was wondering if someone could explain me a bit further how materials work with radiodiosity in a bit more depth please?

reflection of light energy from a surface.

materials "reflect colour" (energy), which significantly contributes towards a mathematical solution for photorealistic rendering (aka radiosity etc). a bit too simplistic though....

 

the resources page is a good place to start with:

http://www.cgarchitect.com/resources/default.asp

 

and here are some rather eclectic readings:

 

As in thermal heat transfer, the basic radiosity method for computer image generation makes the assumption that **surfaces are diffuse emitters and reflectors of energy, emitting and reflecting energy uniformly over their entire area. It also assumes that an equilibrium solution can be reached; that all of the energy in an environment is accounted for, through absorption and reflection.

http://www.siggraph.org/education/materials/HyperGraph/radiosity/overview_1.htm

old, but an interesting slide show nevertheless. you can surmise from this the importance of mesh size (artifacts), sampling, colour and reflectance values for materials and **surfaces.

 

and on the relationship between colour, materials, reflectance and radiosity:

http://www.informatics.ed.ac.uk/teaching/modules/cg/lectures/lect12.pdf

 

and some more detail on the mathematical issues related to sampling a surfce material in order to solve the radiosity equation:

http://www.win.tue.nl/~alext/COURSES/GLOBILLUM/radio2.ppt)

 

and vladimir's (aka. vlado) investigation of photon mapping and irradiance with vray

http://www.vrayrender.com/stuff/PMapTutorial/

 

there are many other, and probably better, articles for your interest. it depends on how much depth you prefer.....

[rachel]

thank you so much for these article. I am very gratefull. please keep in touch if you come across any good reading/tutorials about this subject.

rach

[vizwhiz]

hi There

 

Rachel

 

here is a Link to a List of Links, for VIZ info:

 

Main Link: Viz-Link:

 

http://www.viz2000.com/html/link/viz-link.html

 

Materials:

 

http://www.viz2000.com/html/link/viz-linkmtrl.html

 

Modeling:

 

http://www.viz2000.com/html/link/viz-linkmode.html

 

Lighting:

 

http://www.viz2000.com/html/link/viz-linklgts.html

 

****

 

for Materials: (some Free some are for Sale):

 

Main Link = AlfaLink:

 

http://www.viz2000.com/html/alfa/alfalink.html

 

Flooring:

 

http://www.viz2000.com/html/alfa/flooring.html

 

Walls Exterior:

 

http://www.viz2000.com/html/alfa/wall-exterior.html

 

Wals Interior:

 

http://www.viz2000.com/html/alfa/wall-interior.html

 

The FreeList 2d:

 

http://www.viz2000.com/html/alfa/freelist-textures.html

 

****

 

let me know if This is helpful

 

Thanks

 

Randy

www.viz2000.com

[rachel]

hello randy,

that was more than helpful. thank you ever so much for directing me in such a good directions.

rachel