Largest possible grid size / Possible cause for FFX to crash

[renochew]

Hi, this is a rather general question, how to determine the maximum possible grid size for a workstation can handle？ is it suffice just to read the memory requirement shown in the UI?

I ask because I have a few crash in the middle of a rather high rez sim (~800) and I am not sure what the cause is.　The simulation itself is very simple, just an object emitting fuel/smoke and let FFX do the rest. No sudden change of object speed whatsoever.

Any suggestion would be appreciated.

[jrand]

Sorry but what do you mean by ~800?

Less than or up to 800 what?

Workstations are like women (lol or men for that matter) they come in all shapes and sizes.

An average 24gb ram workstation should be able to export a generic smoke/fire simple source grid 300 frames long at a resolution of 500x500x500. See that helps Who knows they are all different.

Post your systems specs.

Second post your basic fume params, your grid size, duration, what channels are you exporting, source types, collision objects, forces(if any), ect.

Make note of the 3dsmax process ram usage in the task manager at crash time.

[renochew]

Hi JRand,

Thanks the reply. Actually, my question is not specific to my workstation or my current project (BTW, I mean 800*800*800 when I wrote '800'), I am just curious about how to determine the maximum grid size a workstation can handle, any workstation. Currently, I am just looking at the estimation shown on the Fumefx UI general tab regarding the maximum memory requirement.

So the possible answer to my question will be like "Yes, the info shown on the UI is accurate, and you should be able to run a simulation if you got that amount of memory in you workstaton" or "Even you have enough memory, your sim may still crash if ...."

Hope I make myself clear and sorry for the confusion.

Reno

[jrand]

np I had assumed it may have been 800 by 3, like they say about assumptions.

The answer would be maybe, the ram usage is a "best guess", you really aren't going to know exactly how much usage there is until you sim.

You have to take into account what max is currently using. So if you have a simulation chock full of max intensive objects, like particle systems, heavy deformations, other ram gobblers, you need to adjust for that.

IE is the max process is using 8gb of ram WITHOUT the Fume sim you need to add the simulations guesstimate on top of that.

There is really no "This is the limit and it will sim" type of calculation, it is mostly testing and knowing what Fume and your workstation can and cannot do. Sorry that is the best I can do for you.