Cloud shape creation.

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Hello,

After reading the artcile about Rio and the cloud asset management of blue sky, I decided to try to do “the same”.

There is now some result.
The first is the mesh creation to control the shape of the cloud. For me, it's a 3 layers mesh.
The main problem is the amount of point at the end of the process and the issue it brings to the final isooffset fog creation.
It's not possible to create clean isooffset with the 3 layers merged together.
So a first isooffset mesh is create for each layer and this 3 iso ( primitives) are merged and linked to a ForEach Sop.
Inside this Sop, there is a Volume Mix Sop to merge all the 3 iso in one volume primitive.
And everything is export in i3d.

Now I plan to add noise to this shape and find a way to render it as best as possible.
If someone have some link about SSS for volume render …. It's nice ( even if I am afraid of my math level compare tothe paper I tried to read already).

++

Vincent

Attachments:
attachment base_vol.jpg (35.5 KB)
attachment opengl.jpg (217.4 KB)

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#1
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Ok I used the workflow form CMivfx fractal tut.
For now my cloud has a 3 layers turbonoise to displace it …


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Vincent

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attachment turbnoise_vol.jpg (48.1 KB)

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Its looking really good so far
NicoZ
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here is the firtst render with this workflow.
The balls of the main shape are to present for now and there is some strange little “ transparent” lines appaearing at the bottom of the cloud …

++

Vincent

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attachment finaltest01.jpg (90.0 KB)

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Cool, how did you manage with the SSS??
NicoZ
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there is no sss
is a trick taken from a thread on odforce forum.
http://forums.odforce.net/index.php?/topic/12923-pyroclastic-noise-demystified/page__hl__pyroclastic__st__36 [forums.odforce.net]

I had the time for a last render
19 min on 6 threads of 3Ghz i7
It's a bit long IMO … and I am not able to get some nice godrays for the moment :cry:

++

Vincent

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attachment finaltest02.jpg (87.2 KB)

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I rebuild the tool.
I gave up I3d and now focus on Point cloud …
I made new cloud shape creator. I export from it 3 PCloud files.
PointCloud data are used to render volume.

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Vincent

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attachment newOpenGl.jpg (218.7 KB)

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Now the procedural volume rendered from point clouds.
I created my own mutlifractal procedural texture for this and I try to fade the bottom of the cloud too.


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Vincent

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attachment volVexTest.jpg (43.9 KB)

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looking great so far! can you please elaborate how exactly you're using point clouds to get this done?
keep the great stuff coming,

cheers!

Manu
http://vimeo.com/user2522760 [vimeo.com]
Manuel Tausch
Senior FX TD - Industrial Light and Magic Vancouver
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@ manu :
The screen shot of the opengl shows sphere primitive because my first tests was to create i3d files. Create volume from object is faster with primitive.
Now it's possbile to use polygon directly.

- First layer, some point and copy sop to get the “big ball” shape.
- Second layer. With copy sop and scatter sop I clone some sphere meshes. Radius is decided with expression based on the normal Y ($NY) of the scatter points.
-Third layer.Cookie sop between 1st and 2nd layer. Scatter sop on theses polylines. I use the points with another copy sop.
I create an attribute to keep radius for each layer and I render 3 point clouds.
Afterward, within a vex shader builder shop, I import my 3 point clouds and get the “initial” volumetric sphere reading the radius attribute. I apply a multifractal over it and another procedural to simulate advection. Finally I try to decrease the density at the bottom of the cloud.

Now I am testing the lighting …

++

Vincent

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attachment volRdrTest02.jpg (45.3 KB)

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thanks for the explanation dude!
your fake sss is looking good, it's a neat trick!
http://vimeo.com/user2522760 [vimeo.com]
Manuel Tausch
Senior FX TD - Industrial Light and Magic Vancouver
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Looks really great !!!
Would you share your scene file ?
I would really be interested going through the file ..
www.woogieworks.at
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the files is a mess.
I'll prepare something clean as soon as I finished with this.
It progess.

I will begin some anim test now.

++

Vincent

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attachment clonerdrTest.jpg (117.3 KB)

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vbk!!!
the files is a mess.
I'll prepare something clean as soon as I finished with this.
Vincent

waiting eagerly
www.woogieworks.at
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a little animation make with my cloud system.
http://vimeo.com/33996616 [vimeo.com]
I will make some new shading test later.
Now it's time to clean everything and try to make real tools from the hip file.

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Vincent
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some ask for a hip file so …
it's still a mess.

Inside the cloudshape, there is a subnet where you can find the setup used to construct the cloud, a shopnet with a cvex shader and some other stuff …
I use an otl made by myself ( a multifractal vexop) and I don't how how to embedded it in hip file. So don't worry if it's missing.

Hope it helps

Attachments:
attachment cloudshape5.hip (1.3 MB)

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thanks a lot for sharing !!
www.woogieworks.at
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reupload the hip with embed otl ( i hope)
thx jacky to warn me.

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attachment cloudshape5.hip (1.4 MB)

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Those are some happy little clouds. You are a regular bob Ross. Thanks for sharing your work.


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Thanks.

I am trying to convert this work to otls now.
One asset for the cloud design and another one for the render part.

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Vincent
http://vimeo.com/vbkstudio [vimeo.com]
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