[Sidefx-houdini-list] hurricane on Saturn

Gerbrand Nel g at cannonballbunny.com
Tue Nov 24 22:23:12 EST 2015


Hi Jordan. This technique sounds perfect, thanks.
When you say "paint" velocity, do you mean something like combing the 
normals and using those?
Unfortunately your attachment didn't come through.
Could you send it to me directly?
g at cannonballbunny.com
Thanks
G
On 24/11/2015 16:19, Jordan Walsh wrote:
> I have attached a setup with a null driving the twist volume deformer. Of
> course you can add more features like a ramp for better falloff control,
> etc.
>
> Jordan
>
> On Tue, Nov 24, 2015 at 1:58 PM, Jordan Walsh <jordan.h.walsh at gmail.com>
> wrote:
>
>> I have done this type of thing before (Eye of Jupiter) and the best way to
>> go is to model the clouds with polygons and then use the cloud noise tool.
>> Once you have the base you can add some deformers like a twist using volume
>> vops. Layer up a whole pile of them to get the small twirls and then the
>> big twirls. Theses should all be animatable so you get your motion from
>> them. You have to get a bit into using matrix rotations with distance
>> falloffs, but once you get the hang of it, its easy.
>> We used a system where we could paint our velocity directions onto a mesh
>> then use that to drive the motion of the volume for slow flowing volumes.
>> These techniques may not work if you need more of a faster evolving volume.
>>
>> Jordan
>>
>> On Tue, Nov 24, 2015 at 11:34 AM, Gerbrand Nel <g at cannonballbunny.com>
>> wrote:
>>
>>> Hey guys
>>> I'm working on a personal project, and part of it involves a close up
>>> shot of the north-pole of Saturn.
>>> Look here:)
>>>
>>> http://www.universetoday.com/98667/incredible-raw-image-of-saturns-swirling-north-pole/
>>> It needs to move allot faster than real life, almost a full rotation per
>>> min.
>>>
>>> How would you guys approach this?
>>> Any links to info or tutorials on this kind of stuff would be super
>>> helpful.
>>> Thanks
>>> Gerbrand
>>>
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>>
>>
>>
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