Did you render twice? Although, for me, every time after the first render
when POV-Ray is run on a fresh start the problem occurs always from then
on.
I used a [1.01 color rgb<#,#,#>] and got exactly the same result as with a
1.0 so this is curious if you actually get a corrected gradient mapping.
The box by the way shows the x and z gradients also do this.


Ron Parker wrote:
> 
> On Fri, 21 May 1999 05:21:58 -0500, Bob Hughes wrote:
> >Sorry to say, no, this isn't a fix to the problem. I had tried it, and I
> >should have mentioned it the first time. Used 1.01 and 1.1, neither
> >changed anything about it. I'm very surprised I hadn't noticed it until
> >now, which is one reason I suspected a problem at my computer alone.
> 
> That's funny, it worked for me, though it doesn't look like what you might
> have expected it to.  The ends of the cylinder turn light instead of dark.
> If you're wanting dark, you might need to scale smaller instead of larger.
> 
> Note, though, that I'm talking about scaling JUST THE TEXTURE, not the
> object.  The problem is that the gradient you've specified goes directly
> from light to dark right at y=1 and at y=-1.  That's also where the endcaps
> of your cylinder are, so a little mathematical imprecision that gives you
> an intersection at y=.9999999 gets a light pixel, while one that gives you
> an intersection at y=1.0000001 gets a dark pixel.  Of course if you scale
> them both together, the problem doesn't go away, because the planes still
> coincide.

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