"jaime" <jai### [at] ignoranciaorg> wrote in message 
news:422f4a28$1@news.povray.org...
<snip>
>
>   Practically, the important point is that you don't have to bother
> making colors for pigments of known materials. I find it specially
> useful with colors wich are difficult to get right, like the green
> pigments of plants. It accomplishes the same goal as sampling the colors
> from a photo, but with the advantage that the colors are not "changed"
> by the lighting on the photo, the camera white balance, etc...
>
>   Mixing with non-sampled colors is not a problem, but you should
> adjust them to look similar to the sampled ones in brightness and
> saturation, so it's better to use one of both types only.
>

Ok, so there wasn't a lot that I wasn't understanding in this regard.  The 
RS samples can be good to reference against, and they can be used to simply 
avoid having to spend a lot of time figuring out a certain color.  That 
makes sense to me.

I wasn't sure if I was really doing something "wrong" by using RGB values. 
There are so many other things that we guess at (like diffuse, brilliance, 
specular, etc.), that the RS is only one small piece.

>> Lightsys is an amazing set of includes/macros which everyone should 
>> probably be using, but at this point, I don't understand it very well. 
>> Some day, it would be nice to have a good tutorial "Lightsys for Dummies" 
>> or something. Perhaps I'll begin writing it up, if I ever get to the 
>> point that I truly understand enough of it.
>
>   Yeah... I've that tutorial on the to-do list, who know for how many
> years... as I mentioned, the main problem is that I don not fully
> understand all the functionality (appart from lazzines, that is).

It might be something that we could get started on the wiki, also.  Just 
another thought...

>
>> As always, any insight would be appreciated.
>
>   Hope that helped as a start...
>

It does!  I'm having a lot of fun messing around with lemon walls 
(demo_indoor1) among other things, like varying the Daylight/Sun 
temperature.  I've also learned a few other tricks from that demo which are 
quite useful, like putting media inside the window.

Thanks!  :-)

-- 
Jeremy M. Praay
www.beantoad.com

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