[Sidefx-houdini-list] sand inside glass container

Larry Giunta larry at gcreativestudios.com
Wed May 2 11:57:07 EDT 2018


Beautiful!


> On May 2, 2018, at 11:54 AM, David Johnson <daveinengland at gmail.com> wrote:
> 
> That's a really nice piece. I love that film. Nice job!
> 
> On Wed, May 2, 2018 at 8:45 AM, Marco Melantonio <mmelantonio at gmail.com>
> wrote:
> 
>> Hi Gerbrand.
>> 
>> 
>> I just did a shot like that but unfortunately they changed the camera to a
>> closeup shot and we don't had time to increase the resolution due the
>> dealine..
>> https://vimeo.com/267591296
>> 
>> But the collisions worked fine.
>> 
>> The mainly issues that we had were:
>> 
>> - The girl animation was to fast, so I had to increase gravity and sub
>> steps a lot (6 to 7 times I guess)
>> - The final sand resolution must be ridiculous high. We tried to use Sand
>> Upres, but it has limitations...
>> - I was expecting a bounce of sand particles when the girl hits the ground
>> but I couldn't find a way.
>> - I tried to render a UpRes sim inside Maya using Houdini Engine, but 64Gb
>> of memory wasn't enough.
>> 
>> Pay attention to your scene scale.
>> Tweak your collisions like when simulating flip fluids.
>> 
>> I migrate to Houdini a year ago and that was my first time using the grain
>> solver, so probably there are more things that I missed.
>> 
>> There is a high resolution sand simulation baked to switch, but we are
>> trying to render. Probably we will have to render in Houdini using Mantra
>> because Maya with Arnold are crashing every try.
>> 
>> Any tips with this would be great too!
>> 
>> Good Luck
>> 
>> 
>> 
>> Marco
>> 
>> 2018-04-20 0:54 GMT-03:00 Gerbrand Nel <g at cannonballbunny.com>:
>> 
>>> Hey guys.
>>> I need to do a shot where an hourglass filled with sand, falls and breaks
>>> on the floor.
>>> Anyone have tips or know of tutorials that might help?
>>> I'm finding it hard to get the sand to stay inside the container while
>> its
>>> falling.
>>> Any help or tips will be much appreciated.
>>> Thanks so much
>>> Gerbrand
>>> 
>>> 
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