[Sidefx-houdini-list] hurricane on Saturn

François Duchesneau sidefx at trinix.ca
Thu Nov 26 10:39:00 EST 2015


Hi Jordan,

You cannot attach files with the mailing list. I suggest you post it in 
this thread to keep the discussion at the same place.

https://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=42526 


Thanks

Francois

On 11/25/2015 04:31 AM, Jordan Walsh wrote:
> 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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