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Hello friends
I've been an infrequent user of Povray for quite a few years and although I'm
no master I'm amazed at what I can do with this program. I have recently been
sorting through old files composed and rendered in Pov versions 3.1 to 3.5 and
re-rendering them in 3.6 with camera angle changes. The results are strange in
that there appears to be a division line in the middle of the object or
background or both. It seems to have something to do with colour maps or
graduated textures but what it is exactly...
Any ideas, anyone?
Thanx tgl
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On Wed, 19 Dec 2007 05:13:43 EST, "tgl" <aub### [at] sympatico ca> wrote:
> Hello friends
> I've been an infrequent user of Povray for quite a few years and although I'm
>no master I'm amazed at what I can do with this program. I have recently been
>sorting through old files composed and rendered in Pov versions 3.1 to 3.5 and
>re-rendering them in 3.6 with camera angle changes. The results are strange in
>that there appears to be a division line in the middle of the object or
>background or both. It seems to have something to do with colour maps or
>graduated textures but what it is exactly...
> Any ideas, anyone?
> Thanx tgl
>
Posting an image in povray.binaries.images would illustrate what you are
describing.
Regards
Stephen
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"tgl" <aub### [at] sympaticoca> wrote:
> Hello friends
> I've been an infrequent user of Povray for quite a few years and although I'm
> no master I'm amazed at what I can do with this program. I have recently been
> sorting through old files composed and rendered in Pov versions 3.1 to 3.5 and
> re-rendering them in 3.6 with camera angle changes. The results are strange in
> that there appears to be a division line in the middle of the object or
> background or both. It seems to have something to do with colour maps or
> graduated textures but what it is exactly...
> Any ideas, anyone?
> Thanx tgl
The gradient pattern is no longer mirrored about the origin since v3.5... this
could be the culprit.
http://www.povray.org/documentation/view/3.6.1/380/
If not, as Stephen said, an image illustrating the problem would be helpful!
Bill
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web.4768eed7ed87c11c829ff420@news.povray.org...
The way gradient works has changed since 3.5.
See http://www.povray.org/documentation/view/3.6.1/380/
G.
> Hello friends
> I've been an infrequent user of Povray for quite a few years and although
> I'm
> no master I'm amazed at what I can do with this program. I have recently
> been
> sorting through old files composed and rendered in Pov versions 3.1 to 3.5
> and
> re-rendering them in 3.6 with camera angle changes. The results are
> strange in
> that there appears to be a division line in the middle of the object or
> background or both. It seems to have something to do with colour maps or
> graduated textures but what it is exactly...
> Any ideas, anyone?
> Thanx tgl
>
>
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tgl nous apporta ses lumieres en ce 2007/12/19 05:13:
> Hello friends
> I've been an infrequent user of Povray for quite a few years and although I'm
> no master I'm amazed at what I can do with this program. I have recently been
> sorting through old files composed and rendered in Pov versions 3.1 to 3.5 and
> re-rendering them in 3.6 with camera angle changes. The results are strange in
> that there appears to be a division line in the middle of the object or
> background or both. It seems to have something to do with colour maps or
> graduated textures but what it is exactly...
> Any ideas, anyone?
> Thanx tgl
>
>
Is your image using a gradient pattern? In older versions, it used the absolute
value of the distance from the origin, it's no longer the case. Depending on
your case, you may be able to get a good result using the marble pattern.
--
Alain
-------------------------------------------------
OK, so what's the speed of dark?
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"Bill Pragnell" <bil### [at] hotmailcom> wrote
>
> The gradient pattern is no longer mirrored about the origin since v3.5... this
> could be the culprit.
>
> http://www.povray.org/documentation/view/3.6.1/380/
>
Bill + Giles
Thanx for the reference to the docs (Should have gone there in the first place)
but I'm not quite getting it. Is there no fix to revert gradient x, y or z to
negative integers?
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web.476a2c50af847649dc77890b0@news.povray.org...
> "Bill Pragnell" <bil### [at] hotmailcom> wrote
>>
>> The gradient pattern is no longer mirrored about the origin since v3.5...
>> this
>> could be the culprit.
>>
>> http://www.povray.org/documentation/view/3.6.1/380/
>>
> Bill + Giles
> Thanx for the reference to the docs (Should have gone there in the first
> place)
> but I'm not quite getting it. Is there no fix to revert gradient x, y or z
> to
> negative integers?
The fix is given in the doc: replace the original "gradient x" (or y or z)
by "function{abs(x)}" to obtain the pre-3.5 behaviour.
Gilles
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> The fix is given in the doc: replace the original "gradient x" (or y or z)
> by "function{abs(x)}" to obtain the pre-3.5 behaviour.
>
> Gilles
Yep
Staring me right in the face. Thanks Gilles and everyone else for their input.
tgl
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