[Sidefx-houdini-list] hurricane on Saturn

Gerbrand Nel g at cannonballbunny.com
Fri Nov 27 09:40:46 EST 2015


Wow Jordan.. your example scene taught me so much already! Thanks!
G
On 26/11/2015 19:01, Jordan Walsh wrote:
> Thanks Francois, I'll head over
>
> On Thu, Nov 26, 2015 at 3:39 PM, François Duchesneau <sidefx at trinix.ca>
> wrote:
>
>> 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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