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"Paolo Gibellini" <p.g### [at] teinos com> wrote:
> Thank you for the suggestions.
> This is the result. Now I'm planning to add a flow of fishes and some shells
> or pebbles.
> ;-)
> Paolo
Wow!
I've been trying to get water on sand to look right for days. I think I have
some coincident surface problems...
Post a reply to this message
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Ok, this is one test of blur averaging the normals.
Rendering becomes sloooow, and my test are made with not much normals, but
the result is interesting.
This weekend I will end the test and post sources.
Bye,
;-)
Paolo
> You may blur the reflection a little bit by avaraging a set of slightly
> different normals. (->
> http://tag.povray.org/povQandT/languageQandT.html#blurredreflection)
> ... dave
> "PM 2Ring" wrote:
> I've been trying to get water on sand to look right for days. I think I
have
> some coincident surface problems...
Post a reply to this message
Attachments:
Download 'riva65_1024_aa.jpg' (97 KB)
Preview of image 'riva65_1024_aa.jpg'
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Paolo Gibellini wrote:
> Ok, this is one test of blur averaging the normals.
> Rendering becomes sloooow, and my test are made with not much normals, but
> the result is interesting.
> This weekend I will end the test and post sources.
> Bye,
> ;-)
> Paolo
>
excellent ...
the water surface looks much more convincing this time.
AFAIK averaging textures always have the drawback of beeing dammend slow
as you need at least 10 single textures to surpress banding. Everything
over 256 would have no noticeable effect in my opinion (at least with
8bit per channel).
For a given point of the multitextured object POVRay have to run the
whole tracing routine for each single texture. So by averaging 10
textures it takes 10 times as long as with a single texture (of cause
only for the parts in the render where the multitextured object is visible).
... dave
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Paolo Gibellini wrote:
> Ok, this is one test of blur averaging the normals.
> Rendering becomes sloooow, and my test are made with not much normals, but
> the result is interesting.
> This weekend I will end the test and post sources.
> Bye,
> ;-)
> Paolo
>
Hi Paolo,
just a quick shot of yesterday evening. I know the water texture is
pooooooor compared to yours, but it shows the effect I wanted to point out.
Slightly blurred normals (10 textures averaged) gives you the feeling of
slightly motion blurred image (as the water geometry alters coninously)
and overcome this hyperrealistic snapshot effect of to accurate reflections.
... dave
Post a reply to this message
Attachments:
Download 'laguna.jpg' (46 KB)
Preview of image 'laguna.jpg'
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I think I've understood the concept, my main difficulty now is perform test
in decent times.
I'm trying to render 8 textures averaged and I've estimate a render time of
3 days...
;-)
Paolo
> "David El Tom" wrote:
> Hi Paolo,
>
> just a quick shot of yesterday evening. I know the water texture is
> pooooooor compared to yours, but it shows the effect I wanted to point
out.
> Slightly blurred normals (10 textures averaged) gives you the feeling of
> slightly motion blurred image (as the water geometry alters coninously)
> and overcome this hyperrealistic snapshot effect of to accurate
reflections.
>
> ... dave
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Hello!
Here is the latest render, a little better compared with precedents I think.
Now I want to increase the number of fishes before to start a slow render...
;-)
Paolo
Post a reply to this message
Attachments:
Download 'riva68_1024_aa.jpg' (90 KB)
Preview of image 'riva68_1024_aa.jpg'
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Paolo Gibellini wrote:
> Hello!
> Here is the latest render, a little better compared with precedents I think.
> Now I want to increase the number of fishes before to start a slow render...
> ;-)
> Paolo
>
>
>
looks really great so far,
would you mind to share your water texture setup. Would help me much to
get a feeling how to tweak textures for such scenes.
... dave
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Water texture is here.
As soon as I can add some decent comments and credits I will post the whole
source...
;-)
Paolo
---8<------ snippet ----
// This material arises from Christoph Hormann tutorial
// and was step by step modified following p.b.i. people
// indications (see credits above)
#declare m_water = color_map {
[ 0.00 rgbt <0.217,0.552,0.877, 0.9> ]
[ 0.90 rgbt <0.137,0.437,0.697, 0.95> ]
[ 1.00 rgb <1,1,1> ]
}
#if(water_blur)
#declare BlurAmount = .75; // Amount of blurring --- 0.2 works but .75 I
like better
#declare BlurSamples = 5; //How many rays to shoot --- 40 for my pc is
impossible. 5 is not too bad
#declare t_water = texture {
average texture_map {
#declare Ind = 0;
#declare S = seed(0);
#while(Ind < BlurSamples)
[1 // The pigment of the object:
pigment{
rgbt <0.217,0.552,0.877, 0.9>
}
// The surface finish:
finish {
diffuse 0.3
ambient 0.0
reflection {0.3, 1 fresnel}
conserve_energy
specular 0.3
roughness 0.003
}
// This is the actual trick:
normal {
//bumps BlurAmount
ripples BlurAmount
frequency 1
translate <rand(S),rand(S),rand(S)>*10
scale 1000
}
]
#declare Ind = Ind+1;
#end
}
}
#else
#declare t_water = texture {
pigment{
rgbt <0.217,0.552,0.877, 0.9>
/*
// I prefer a single pigment
gradient z
color_map {m_water}
turbulence 0.9
*/
}
normal {
ripples 0.75
frequency 1
translate <-3,0,3>
}
finish {
diffuse 0.3
ambient 0.0
reflection {0.3, 1 fresnel}
conserve_energy
specular 0.3
roughness 0.003
}
}
#end
#declare i_water =interior {
ior 1.33
fade_distance 0.3
fade_power 1000
fade_color <0.217,0.552,0.877>
}
#declare m_acqua =material {
texture {t_water}
interior {i_water}
}
---8<------ snippet ----
> "David El Tom" wrote:
> would you mind to share your water texture setup. Would help me much to
> get a feeling how to tweak textures for such scenes.
> ... dave
Post a reply to this message
Attachments:
Download 'riva70_1024_aa.jpg' (91 KB)
Preview of image 'riva70_1024_aa.jpg'
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Paolo Gibellini wrote:
> Water texture is here.
> As soon as I can add some decent comments and credits I will post the whole
> source...
> ;-)
> Paolo
thanks a lot ...,
be sure that I will play with it ...
will post it if I achive something nice.
... dave
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... a night shoot.
For a while I will have no more time for this scene, but I've posted sources
in p.b.s. as promised.
Have a nice day and thank you all for the suggestions
;-)
Paolo
Post a reply to this message
Attachments:
Download 'riva79_1024_aa.jpg' (92 KB)
Preview of image 'riva79_1024_aa.jpg'
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