Re-2: [Radiance-general] Color reflectance values and materials..

[Erwin Zierler]

I have been thinking about a material library/editor for a while too. For many  needs it would be probably sufficient to have a basic database with the simpler materials (plastic, metal, glass,...) but as soon as it comes to more complex/combined materials the task of providing a useful interface becomes more of a challenge. Schorsch has addressed this with his material editor in Rayfront but this is not targeting beginners. I think that for many users it would be just fine to have something similar to the colorpicker tool (http://www.luxal.eu/resources/radiance/cp4r.shtml), maybe extended with the functionality of adding at least your own custom textures (image uplaod) to basic materials. 
Anyway, as a start it might be worth thinking about a central web based material depository where we all can share our own creations. The display format can be a simple list with mat, cal, pic files and a little preview.
Anyone interested in starting that? 

Regards,
 Erwin


> Original Message        processed by David.InfoCenter 
> Subject: Re: [Radiance-general] Color reflectance values and materials.. (05-Nov-2008 19:50)
> From:    R Fritz <rfritz at u.washington.edu>
> To:      radiance at rendigo.com

>> I would like to know if there is any specific way to find the 
>> reflectance > of red, green and blue in order to obtain a specific 
>> color desired.

> If you've got a sample of the color, sure--you do colorimetry and convert > the values from the colorimeter's color space to the Radiance color 
> space. It takes some care to choose the sample, however.

> Secondly is there any library of materials to choose from ..?

> We wish! Developing one, or tools to generate them from other data is a 
> project that so far has not been addressed.

> Randolph