"Nathan Kopp" <Nat### [at] Koppcom> wrote in message
news:394f63a5$1@news.povray.org...
|
| Lee Brown <lee### [at] prodigynet> wrote...
| >
| > Using a height_field with the pattern modifier I have a problem when using
| > "phase".  The height-field becomes very badly distorted.
|
| This is not a bug.  What you are seeing is what you should expect.  Please
| carefully read the section on "phase" in the POV documentation.  The phase
| modifier essentially "rotates" your color_map.  When rotated, the 0.0=0.0
| and 1.0=1.0 end up right next to each-other, so they create a discontinuity
| in the function.  That discontinuity produces a vertical drop/rise in the
| height-field.
|
| If you change your color_map to the following, then things will look more
| like what you'd expect.
|     color_map {
|       [0 rgb 0]
|       [.5 rgb 1]
|       [1 rgb 0]
|     }

I see now that I was looking at it wrong, I should have put a plane at y*0 to
be certain.  I thought surely it was going below 0 instead.  Wrong.  Sorry if
I mislead you Lee.

Bob

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