[Sidefx-houdini-list] frost effect

Gerbrand Nel g at cannonballbunny.com
Fri Mar 6 07:30:26 EST 2015


Wow OWL
That is soo generous!!
Thanks for the effort man, It seems like you've done half the job for me :)
G

On 06/03/2015 12:52, Owl wrote:
> Hi, Gerbrand,
> in case you need a place to start from:
> http://we.tl/cbBaNo4nJh
>
> On Fri, 6 Mar 2015 at 11:55 Jordan Walsh <jordan.h.walsh at gmail.com> wrote:
>
>> Use a sop solver to have a frost attribute creeping across the mesh. (use
>> some type of pc lookup to get the frost to spread, add some noise in too...
>> what ever works). Time shift your mesh to one frame so it is static then
>> attrib copy it back on to the animated mesh.
>> You can also do it with a points in a sop solver, add some noise to move
>> the point, use an SDF of the mesh to snap the point to the surface then
>> repeat. You can get some nice patterns of creeping tendrils that way. you
>> can then attribute transfer the frost attribute from the points to the
>> mesh.
>> Once you have the attribute you can use this to grow fur, then add a poly
>> wire sop to get the crystal look.
>>
>> Jordan
>>
>>
>> On Fri, Mar 6, 2015 at 9:13 AM, Gerbrand Nel <g at cannonballbunny.com>
>> wrote:
>>
>>> Nice!!
>>> Houdini has not stopped blowing my mind..
>>> This effect however needs to look allot more like frost, and not just
>>> frozen water.
>>> I know frost is frozen water, but my client wants the small hair-like
>>> spiky crystals you get from frosting.
>>> Thanks for the help so far guys.
>>>
>>> On 06/03/2015 10:36, Gerbrand Nel wrote:
>>>
>>>> Thanks Olivier!
>>>> I like the neighbour / Mexican wave idea.
>>>> Do you know if a ray sop would be the best place to start? in soft I
>>>> would use a find neighbours, or get nearby points.
>>>> My other idea was to just activate them with radius of a null (always
>>>> forget what you call them in houdini), But it might be more natural with
>>>> the "neighbour" idea
>>>> G
>>>>
>>>> On 06/03/2015 09:58, Olivier Jeannel wrote:
>>>>
>>>>> Hey Gerbrand,
>>>>> Not a tutorial but an interesting article from Yancy Lindquist he
>> talks a
>>>>> bit about Frozen.
>>>>> http://www.fxguide.com/featured/rise-of-the-effects/
>>>>> Might inspire...
>>>>> Le 6 mars 2015 08:39, "Gerbrand Nel" <g at cannonballbunny.com> a écrit :
>>>>>
>>>>>   Hey guys
>>>>>> I need to jump in at the deep-end with houdini, otherwise I might
>> never
>>>>>> get the confidence to tackle a job.
>>>>>> A client has asked me to create frost on someone’s skin.
>>>>>> Imagine Elsa from Frozen looses her shit, and sneezes on someone.
>>>>>> So its a kind of spreading, time-lapse hoarfrost. ( do think its funny
>>>>>> calling it hoar-frost right after referencing Elsa, but that's just
>> me)
>>>>>> Any pointers, suggestions, links to tutorials, or general well wishes
>>>>>> would be appreciated :)
>>>>>> I come from softimage-land and have done some houdini engine work for
>>>>>> Maya
>>>>>> projects, but it would be safe to assume I know close to f-all in
>>>>>> houdini,
>>>>>> so please use toddler words if possible :)
>>>>>> Thanks guys
>>>>>> Gerbrand
>>>>>> /
>>>>>> PS Could someone just do a ping reply, cause I never see my own posts,
>>>>>> and
>>>>>> then I get paranoid over if it reached you guys ./
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