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From: Thomas de Groot
Subject: Re: Bad weather in Gancaloon: wip 4 -- the macros
Date: 26 Oct 2013 03:28:41
Message: <526b6f29$1@news.povray.org>
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On 25-10-2013 18:09, MichaelJF wrote:
> that is really hard to judge without the full code. If I understand the
> function{abs(y)} used in p_drop_base correct your splashes should have a clear
> pigment at the base (rgbt <0,0,0,0>) and rgbt <1,1,1,0.416> at the top (of the
> cylindrical part). But that should not cause this very bright white spots. But I
> admit that function patterns and double_illuminate are still at my to do list
> (volume IX page 317 ;-). Have you changed the back_ground color to white? Sorry
> no further ideas so far.
I am not yet sure about what causes it. Essentially, I use Jaime's
texture, only a little adapted in the case of the splashes. They are
almost transparent. It seems to have to do with splashes on a water
surface. I am still trying to exclude causes.
Thomas
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From: Thomas de Groot
Subject: Re: Bad weather in Gancaloon: wip 4 -- the macros
Date: 26 Oct 2013 03:29:38
Message: <526b6f62$1@news.povray.org>
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On 25-10-2013 16:56, scott wrote:
> Maybe a very small amount of focal blur would help?
It would not make the bright spots/pixels disappear I am afraid.
Thomas
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Thomas de Groot <tho### [at] degroot org> wrote:
> On 25-10-2013 18:09, MichaelJF wrote:
> > that is really hard to judge without the full code. If I understand the
> > function{abs(y)} used in p_drop_base correct your splashes should have a clear
> > pigment at the base (rgbt <0,0,0,0>) and rgbt <1,1,1,0.416> at the top (of the
> > cylindrical part). But that should not cause this very bright white spots. But I
> > admit that function patterns and double_illuminate are still at my to do list
> > (volume IX page 317 ;-). Have you changed the back_ground color to white? Sorry
> > no further ideas so far.
>
> I am not yet sure about what causes it. Essentially, I use Jaime's
> texture, only a little adapted in the case of the splashes. They are
> almost transparent. It seems to have to do with splashes on a water
> surface. I am still trying to exclude causes.
>
> Thomas
What i meant with the question after a white background is the possibility of an
max trace level issue.
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From: Thomas de Groot
Subject: Re: Bad weather in Gancaloon: wip 4 -- the macros
Date: 27 Oct 2013 03:54:33
Message: <526cc6b9$1@news.povray.org>
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On 26-10-2013 17:43, MichaelJF wrote:
> What i meant with the question after a white background is the possibility of an
> max trace level issue.
An interesting suggestion. I have no background defined, so it should be
black (default). However, I shall test with a higher max_trace value, to
be sure.
Thomas
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From: Thomas de Groot
Subject: Re: Bad weather in Gancaloon: wip 4 -- the macros
Date: 30 Oct 2013 11:15:58
Message: <527122ae$1@news.povray.org>
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On 26-10-2013 17:43, MichaelJF wrote:
> What i meant with the question after a white background is the possibility of an
> max trace level issue.
After testing: no, as expected.
Note: a new version of the rain macros is posted in p.b.s-f.
Thomas
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Thomas de Groot <tho### [at] degrootorg> wrote:
> On 26-10-2013 17:43, MichaelJF wrote:
> > What i meant with the question after a white background is the possibility of an
> > max trace level issue.
>
> After testing: no, as expected.
It was only a desperate idea. With a black (default) background not very likely.
I found another image with strange white areas within a glass-object popping up
as a wallpaper at my screen (I use nearly all IRTC entries which I can render
without to much work as wallpapers) but have not found the code so far. I
suspect some issue with ior here but I'm not sure about it. Unfortunatelly RL
issues are demanding at the moment and I encounter problems with my lightning
appraoch, I have not expected.
Best regards,
Michael
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From: Thomas de Groot
Subject: Re: Bad weather in Gancaloon: wip 4 -- the macros
Date: 31 Oct 2013 03:50:27
Message: <52720bc3$1@news.povray.org>
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On 30-10-2013 20:23, MichaelJF wrote:
> It was only a desperate idea. With a black (default) background not very likely.
> I found another image with strange white areas within a glass-object popping up
> as a wallpaper at my screen (I use nearly all IRTC entries which I can render
> without to much work as wallpapers) but have not found the code so far. I
> suspect some issue with ior here but I'm not sure about it. Unfortunatelly RL
> issues are demanding at the moment and I encounter problems with my lightning
> appraoch, I have not expected.
>
I am still a bit puzzled as the problem does not happen in other
settings, like Jaime's original demo scene which I use for testing. For
now, I have opted for switching off the splash in that particular case.
Thomas
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