[Sidefx-houdini-list] hurricane on Saturn

Jordan Walsh jordan.h.walsh at gmail.com
Wed Nov 25 04:31:06 EST 2015


I have zipped it up, so hopefully will work this time!

On Wed, Nov 25, 2015 at 3:23 AM, Gerbrand Nel <g at cannonballbunny.com> wrote:

> 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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