FumeFX Crashing while performing Post Processing

[grahamc]

Hi

We are trying to re-time several fumeFX simulations, but everytime we run the Post simulation we get a crash. We are using adaptive grids which sims upto a mazimum size of 14899MB, we are not using wavelet. We really need to be able to half the speed of all the simulations. It worked on the low-res simulations we tested.

All are hi-res post sims are failing! We have tried on several machines including one with 32gig of RAM. We have monitored RAM usage and we get a maximun of 15gig before the simulation crashes. It is always crashing on the first frame of the retime. We have also tried copying the default caches localy but it still crashes.

Can anyone please help?
Is it worth trying FumeFX3 we are currently using FumeFX 2.1c and 3DSMax 2012 64bit.

Thanks

Graham

[grahamc]

Hi

Update:- Still trying to fix this crashing problem!

Been doing more tests over the weekend currently the simulation uses a grid spacing of 1.15 (652x765x696) this crashes on the retime. I have tried increasing the grid spacing slighly to 1.2 but it still crashes. If we increase it further to 1.75 (429x503x457) the sim and retime works ok, but lacks the detail we need for the shot.

We don't have fumeFX 3 yet but I have read that it allows you to simulate nested grids in one go with the ability for fields from one grid to pass into the other grid. Keeping this in mind I have tried chopping the grid into quaters and leaving the grid spacing on 1.15. I simmed one chunk of this and the retime worked ok, so am I right to think that if we used FumeFX3's nested grids and did the sim in 4 chunks it might work? Will you be able to see the transition between nested grids at render time? Is the retime just unstable with large data sets? Is it possible to get a demo of FFX3 to do some quick tests.

Thanks for any help

graham

[grahamc]

Another update...

I have tried re-timeing all four of the grids and now get a crash again! Is it possioble that FumeFX 3 is more stable?

It looks like we might have to settle for retiming in after effects ;(

G

[sitnisati]

Hello,

For a test - if you resimulate with spacing twice as big and then try to retime, does it work ?

Also, how does the sim look at the first frame - what channels are present there at the frame when it crashes.

Thank you

Kresimir

[grahamc]

PROBLEM SOLVED

As a test I merged the fume grid into a new scene and ran the post retime and it worked!
I then went back to the scene that was crashing and deleted a few objects at a time to see if I could isolate the problem.

What I have found is that I am using a collision object in the simulation if I remove this before the post sim then it works if i leave it in then it crashes. I know now for future post sims!

Thanks

Graham

[sitnisati]

Thank you for report.
What is maybe a very large object, probably extending outside of the FumeFX grid ?

Regards,

Kresimir