[Sidefx-houdini-list] frost effect

Gerbrand Nel g at cannonballbunny.com
Fri Mar 6 07:30:50 EST 2015


That all sounds great if I translate the idea back to Softimage
Now I just need to read up to understand how to do it all in houdini.
Thanks Jordan!!
On 06/03/2015 11:54, Jordan Walsh 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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