SkinRock nous apporta ses lumieres ainsi en ce 2004/04/28 01:05... :

>Hi, I'm still kind of a new user, I've been goofing around with POV on and
>off for awhile.  I was just wondering what the best way would be to go
>about giving an object that is made of stone, a broken/chipped look.  Not
>necessarily from errosion, but from using a chisel to mold the stone,
>having little cracks and indentations.  The object is just made from this:
>difference{
>cylinder {
>  0*x,  .75*x,  1
>  rotate y*60
>  texture { T_Grnt25 }
>}
>cylinder {
>  -1*x,  2*x,  .4
>  rotate y*60
>  texture { T_Grnt25 }
>}
>}
>I'm looking to give the outer side the chipped look.  I was thinking using
>splines inside the difference bracket, but I didn't know if there might be
>any easier way.  Thanks!
>
>
>  
>
If you only have a, very, few chips (less than 10), you /may/ use some 
small boxes to chip into your cylinder.
If you want chipping all over the surface, you are way beter with the 
suggestion of Tom Melly.

Tip: when you want the same texture or transformation for all parts, 
place it at the end like:
difference{
    cylinder{0*x, 0.75*x, 1}
    cylinder{-0.1*x, 0.76*x, 0.4}
    texture {T_Grnt25} // apply the texture once to the whole object
    rotate 60*y // rotate the complete object at once
    translate <x, y, z> // some displacement
}
Cleaner, easier to read, less prone to errors, use less memory, is 
faster ro write, parse and render.

Alain

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