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From: Le Forgeron
Subject: Re: A speed enhancement for blurred reflections (144KB PNG)
Date: 24 Jan 2011 03:23:57
Message: <4d3d371d@news.povray.org>
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Le 23/01/2011 21:07, stbenge a écrit :
>>
>> Would there be a corresponding technique for speeding up blurred
>> refractions?
>
> There would, if POV had a "no_refraction" modifier.
If you want no refraction, why don't you just turn the transmit & filter
to 0.0 (of the deepest texture in case of layered texture) ?
It seems so simple, I must have missed something.
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From: clipka
Subject: Re: A speed enhancement for blurred reflections (144KB PNG)
Date: 24 Jan 2011 05:37:08
Message: <4d3d5654$1@news.povray.org>
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Am 24.01.2011 09:23, schrieb Le_Forgeron:
>> There would, if POV had a "no_refraction" modifier.
>
> If you want no refraction, why don't you just turn the transmit& filter
> to 0.0 (of the deepest texture in case of layered texture) ?
>
> It seems so simple, I must have missed something.
You have indeed ;-)
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I posted that idea back in 2006. Anyone beat me to it? :)
http://news.povray.org/povray.binaries.images/message/%3Cweb.45509993b8175aee696633280%40news.povray.org%3E
Regards Roman
"Dave Blandston" <nomail@nomail> wrote:
> That's a great idea and it works like a charm, but...
>
>
http://news.povray.org/povray.binaries.images/message/%3C4baab97a%241%40news.povray.org%3E/#%3C4baab97a%241%40news.po
vr
> ay.org%3E
>
> -Just shows you guys are both very sharp!
>
> Regards,
> Dave Blandston
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stbenge <myu### [at] hotmail com> wrote:
> At any rate, it's a good speed enhancement that needed more exposure ;)
There's a blurred reflection entry in the wiki thing describing how to use the
averaged normals, maybe that entry could be enhanced a little to describe the
speed enhancement trick as well. It's a really good tip!
http://wiki.povray.org/content/Knowledgebase:Language_Questions_and_Tips
Regards,
Dave Blandston
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From: stbenge
Subject: Re: A speed enhancement for blurred reflections (144KB PNG)
Date: 24 Jan 2011 13:15:33
Message: <4d3dc1c5@news.povray.org>
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On 1/23/2011 2:42 PM, Christian Froeschlin wrote:
> BTW I just tried: if the refraction leads to total
> internal reflection the no_reflection modifier will
> take effect.
It's good to know, though not something I would rely on ;)
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From: stbenge
Subject: Re: A speed enhancement for blurred reflections (144KB PNG)
Date: 24 Jan 2011 13:23:16
Message: <4d3dc394@news.povray.org>
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On 1/24/2011 3:25 AM, Roman Reiner wrote:
> I posted that idea back in 2006. Anyone beat me to it? :)
>
>
http://news.povray.org/povray.binaries.images/message/%3Cweb.45509993b8175aee696633280%40news.povray.org%3E
This is beginning to look like the "stacked planes" scenerio all over
again :D
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From: stbenge
Subject: Re: A speed enhancement for blurred reflections (144KB PNG)
Date: 24 Jan 2011 13:24:24
Message: <4d3dc3d8@news.povray.org>
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On 1/24/2011 7:59 AM, Dave Blandston wrote:
> stbenge<myu### [at] hotmailcom> wrote:
>> At any rate, it's a good speed enhancement that needed more exposure ;)
>
> There's a blurred reflection entry in the wiki thing describing how to use the
> averaged normals, maybe that entry could be enhanced a little to describe the
> speed enhancement trick as well. It's a really good tip!
>
> http://wiki.povray.org/content/Knowledgebase:Language_Questions_and_Tips
Hmm, I forgot all about the Wiki...
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From: Christian Froeschlin
Subject: Re: A speed enhancement for blurred reflections (144KB PNG)
Date: 24 Jan 2011 15:16:09
Message: <4d3dde09@news.povray.org>
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clipka wrote:
> You have indeed ;-)
Actually I fell into the same trap when first reading
the original post, my mind completely flowed over trying to
understand why anyone would go to the trouble of averaging
256 reflective textures just to tell the object it would
be "not reflecting" after all ;)
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