Nieminen Juha wrote:

>   A normal pattern actually simulates a heightfield.

Am I missing something here ?

As far as I know a normal has no releationship to a height field in any
way what so ever. The models are entirely different.

When you apply a normal to a surface it's properties are controlled
explicitly by two parameters. The first is the float value after the
pattern type i.e. normal { bumps 1 } which sets the normal depth. The
second is the scale of the pattern which only effects the scale of the
pattern itself and not the depth of the normal pertubation. Scaling the
normal will not affect the depth of the normal pertubation and was never
intended to. It may effect the depth of the pattern but it will not
change the depth or height of the pertubation itself. If you want this
value to change then you must change the float value after the pattern
type and not rely on the scale value to do this for you. Any other model
for the normal would not be correct.


-- 
Wishing you Seasons Greetings, A Merry Christmas, and A Happy New Year !
Ken Tyler -  1200+ Povray, Graphics, 3D Rendering, and Raytracing Links:
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