[Sidefx-houdini-list] Smoke sim "resetting"

Alex Czetwertynski disciple1 at gmail.com
Mon Oct 17 13:45:33 EDT 2011


Thanks Larry

I looked for that node in the Billowy Smoke shader and it does not seem to be present, or maybe it has a different name?  I checked the restresetdelay parm and it is indeed set at 50...

Thanks
Alex

On Oct 15, 2011, at 6:04 AM, Larry Giunta wrote:

> Hi Alex,
> 
> Not sure if this helps but I hit a similar snag a few months ago. The below info from support ended up being my issue ( and solution).
> Maybe it somehow relates to what you are experiencing
> 
> ----------
> 1.) The rest field in the fireball_pyro SHOP should match the rest filed in the Pyro Solver DOP. Please check to see if
> /shop/fireball_pyro/dr_rate  (Settings tab -> Reset Rate parameter) is at the same value as
> /obj/AutoDopNetwork/pyrosolver1/restresetdelay  (Advanced tab -> Rest Field tab -> Reset Every Frames parameter).
> By default the Reset Rate parameter = 20, and the Reset Every Frames parameter = 50. These should be the same value.
> ---------
> 
> Larry
> 
> 
> On Oct 14, 2011, at 7:11 PM, Alex Czetwertynski wrote:
> 
>> This is just "off the shelf" as it were.
>> I'm using the default Billowy Smoke shader, haven't touched any of the rest field parms.
>> I'm testing it with the wispy smoke shader, which seems to be working fine so far, so I think I must have messed something up in the default billowy smoke shader.
>> 
>> On Oct 14, 2011, at 4:08 PM, Gene Dreitser wrote:
>> 
>>> Are you using the pyro shader to render your volumes?
>>> 
>>> Are you exporting two rest fields (rest & and rest2)?  Do the 'reset' (don't have houdini in front of me - kinda taking a stab in the dark) settings match from the sim to the shader?
>>> 
>>> IIRC, the default smoke object/smoke solver combo only export a single rest field - while the pyro shader expects two.
>>> 
>>> Or maybe, i'm crazy ;)
>>> 
>>> Cheers,
>>> 
>>> G
>>> 
>>> 
>>> 
>>> ----- Original Message -----
>>> From: Alex Czetwertynski <disciple1 at gmail.com>
>>> To: sidefx-houdini-list at sidefx.com
>>> Cc:
>>> Sent: Friday, October 14, 2011 6:13:14 PM
>>> Subject: [Sidefx-houdini-list] Smoke sim "resetting"
>>> 
>>> Hello
>>> I have a smoke sim that I tweaked a bit on the shader level, making it look a bit more abstract, definitely not photoreal.  My current issue is that it renders fine over a certain amount of frames, and then "resets" somehow, as if the whole simulation had jumped a few frames.  I checked that my noise offset was turned off, but maybe it should be turned on?
>>> 
>>> I can post a render if this description does not make sense
>>> 
>>> Thanks
>>> Alex
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