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El 26/04/16 a las 15:52, William F Pokorny escribió:
> Impressive - though am I correct there are some artifacts in the
> right part of the center top plume? Was it run with AA ?
You have a good eye... I had to zoom several times to see them! Yes,
it was run without AA, and the artifacts are likely due to the media
container (another blob, BTW... I forgot to mention this).
> Asking mostly because of my continuing look into blob related
> bugs.Those spots look like other issues I have seen related to media
> and blobs at the blob(s) boundary.
Yes, that's likely the problem: see the attached test. The inner solid
blob is the object used on the density pattern, and the transparent
outer blob is the media container: you can clearly see the artifacts are
coincident with a blob boundary.
--
jaime
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Attachments:
Download 'blob-clouds-test-03d-containers.jpg' (74 KB)
Preview of image 'blob-clouds-test-03d-containers.jpg'
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Another one using the exact same clouds but with a sunset lighting.
--
jaime
Post a reply to this message
Attachments:
Download 'blob-clouds-test-03e.jpg' (49 KB)
Preview of image 'blob-clouds-test-03e.jpg'
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Jaime Vives Piqueres <jai### [at] ignorancia org> wrote:
> > Nice and fluffy as it should be.
>
> Thanks... perhaps too fluffy, tough.
>
> > The method of averaging object patterns will be of further use - at least I hope
> > so...
>
> Well, it's nothing fancy, just the average pattern. The real trick is
> that the averaged blobs are concentric (with diminishing radius and the
> same threshold):
>
>
> interior{
> media{
> method 3 intervals 1 samples Cloud_Samples
> scattering{2,.01}
> absorption .005
> density{
> average
> density_map{
> [1
> object{
> cloud_a
> color rgb 0
> color rgb .25
> }
> warp{turbulence .5}
> scale 2 warp{turbulence .67} scale 1/2
> scale 4 warp{turbulence 1} scale 1/4
> ]
> [1
> object{
> cloud_b
> color rgb 0
> color rgb .5
> }
> warp{turbulence .5}
> scale 2 warp{turbulence .67} scale 1/2
> ]
> [1
> object{
> cloud_c
> color rgb 0
> color rgb .75
> }
> warp{turbulence .5}
> ]
> [1
> object{
> cloud_d
> color rgb 0
> color rgb 1
> }
> warp{turbulence .5}
> ]
> }
> }
> }
> }
>
> --
> jaime
Thank you for the code snippet.
Concentric is clear, otherwise it would be similar to proximity patterns.
But, who knows...
Norbert
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Am 26.04.2016 um 18:58 schrieb Jaime Vives Piqueres:
> Another one using the exact same clouds but with a sunset lighting.
You folks are amazing!
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On 26-4-2016 18:58, Jaime Vives Piqueres wrote:
> Another one using the exact same clouds but with a sunset lighting.
>
Very nice indeed Jaime. How does this method relate to the df3 one used
by Gilles Tran? I am familiar with that; I also used blobs for making
smoke (Chris Huff or Michael Carneholm macros) but they are pretty slow.
--
Thomas
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Jaime Vives Piqueres wrote on 26/04/2016 14.47:
> I was going to add some cumulus to my sea scene, but the ones I had from
> the project tierra where not very convincing, so... I started another
> experiment.
>
> The approach is similar to that of my previous cumulus include, but with
> a trick to make softer media. As the method involved the object pattern,
> the media was a bit sharp with just 0 or 1 in the density map.
>
> The trick is to create an array of blob components positions and radius,
> then use that to create 4 blobs with concentric shapes and use them on
> an averaged density map. The results are surprisingly fast... this one
> took "only" 47 min.
>
> --
> jaime
>
I like a lot this one!
Paolo
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Gorgeous !
I find them an impressionism touch...
Can't wait to see the composition with the sea.
Jaime Vives Piqueres <jai### [at] ignoranciaorg> wrote:
> I was going to add some cumulus to my sea scene, but the ones I had from
> the project tierra where not very convincing, so... I started another
> experiment.
>
> The approach is similar to that of my previous cumulus include, but with
> a trick to make softer media. As the method involved the object pattern,
> the media was a bit sharp with just 0 or 1 in the density map.
>
> The trick is to create an array of blob components positions and radius,
> then use that to create 4 blobs with concentric shapes and use them on
> an averaged density map. The results are surprisingly fast... this one
> took "only" 47 min.
>
> --
> jaime
Post a reply to this message
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This is excellent. Whenever I've tried to use this type of technique before, I
can never get the media settings right - my clouds either end up
not-really-opaque, i.e. I can see other stuff through even the densest regions,
or so dense that they saturate to black underneath.
Your code looks very straightforward - I must play with it!
Bill
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El 27/04/16 a las 08:56, Thomas de Groot escribió:
> Very nice indeed Jaime. How does this method relate to the df3 one
> used by Gilles Tran? I am familiar with that;
Well, in fact I started first trying df3 clouds: I did my own
"makecloud" using ARRAYS_WriteDF3() to write the cloud files, sampling
the same blobs I'm using now. It worked fine, but it was slow to
generate clouds with decent resolution, and the look was too fluffy.
Also, I found no way to make the clouds less turbulent at bottom.
> I also used blobs for making smoke (Chris Huff or Michael Carneholm
> macros) but they are pretty slow.
Well, I'm using another blob as container, and perhaps that's making
them faster, because I find them not much slower than the df3 ones.
--
jaime
Post a reply to this message
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On 27-4-2016 9:38, Jaime Vives Piqueres wrote:
> El 27/04/16 a las 08:56, Thomas de Groot escribió:
>> Very nice indeed Jaime. How does this method relate to the df3 one
>> used by Gilles Tran? I am familiar with that;
>
> Well, in fact I started first trying df3 clouds: I did my own
> "makecloud" using ARRAYS_WriteDF3() to write the cloud files, sampling
> the same blobs I'm using now. It worked fine, but it was slow to
> generate clouds with decent resolution, and the look was too fluffy.
> Also, I found no way to make the clouds less turbulent at bottom.
Ah yes, the cloud bottom was a problem indeed.
>
>> I also used blobs for making smoke (Chris Huff or Michael Carneholm
>> macros) but they are pretty slow.
>
> Well, I'm using another blob as container, and perhaps that's making
> them faster, because I find them not much slower than the df3 ones.
>
That's interesting. Thanks!
--
Thomas
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