"dlm" <me### [at] addressinvalid> wrote in message 
news:46a6c19f$1@news.povray.org...
>> So far I have a more or less convincing brick texture (not perfectly 
>> suitable for close-ups as can be seen in brickwall-zoomedin.jpg),
>
> Good stuff Zeger,

thank you :)

> Do you allow variability in the dimensions of bricks?

absolutely, you can adjust the size of the bricks, and the way they're 
placed.  Currently, there are 2 types: type 0 (which looks like the normal 
brick pattern, but with more control over the shape and smoothness), and 
type 1 (which is what I showed here)

> I'm used to English style bricks which are not so elongated.
> See http://www.sizes.com/materls/modular_brick.htm for a reference for 
> different styles and dimensions.

that's interesting, I could use that for some default settings! thanks!

> When bricks are laid and dressed some sort of bar (often cylindrical or 
> square) is pulled along the cement leaving a concave depression - the 
> grain follows the brick edges. Your closeup bricks appear to be projected 
> over the cement resulting in an unreal feeling. Also there is too much 
> cement.

currently the cement is not affected in any way by the bricks, it's just a 
very simple granite-pattern.  I might change that, but as long as the bricks 
look too smooth for close-ups, I don't think it's worth the trouble, because 
you won't notice it anyway from a distance :)

> As always, I look forward to more of your excellent work.

thank you :)

cu!
-- 
#macro G(b,e)b+(e-b)*C/50#end#macro _(b,e,k,l)#local C=0;#while(C<50)
sphere{G(b,e)+3*z.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1;
#end#end _(y-x,y,x,x+y)_(y,-x-y,x+y,y)_(-x-y,-y,y,y+z)_(-y,y,y+z,x+y)
_(0x+y.5+y/2x)_(0x-y.5+y/2x)            // ZK http://www.povplace.com

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