FumeFX Issues

[leecobra]

Hi, your right it does look bizarre what yours turned out like, this is how mine turned out in just a matter of a couple of mins messing around.
If you want i can send you the max file via email so you can see what settings i have used. pm me your Email address if you like. Other than that i cannot really tell what you have done.




http://homepage.ntlworld.com/l.bunton/Flame.jpg

[JohnnyRandom]

Looks like the first frame of the simulation to me. does it look the same at frame 100 after running a sim? Looks like some low quality settings, as well.

Couple simple things right off the bat:
Try lowering the gravity a little bit.
Lower the grid spacing at least a quarter of what it is now, if not half it.
Set or keep the vorticity at .5-1.0

Typically, for what you are doing, the default settings will yield pretty good fire right out of the gate.

-John

[Luxo-Jr]

JohnnyRandom - I gave it a go what you suggested and I think it made a minor difference. Not entirely sure. The only thing I didn't have to change was the vorticity.
Here's a comparison of what the simulation looks like at different frame rates.

[JohnnyRandom]

I forgot to mention one of the most important attributes...boyuancy:blush:, set it to 5-10.

[TimWoods]

yep. but also dont forget heat production, and burn rate. These raise the temperature inside the grid. For explosions you can set this right up in the 1000's bracket, not so much for fire tho.

[Glacierise]

And check if the scale of your scene is right :D

[PartiallyFrozen]

If you look at your turbulance settings they might be large. Which is causing the fire to almost smoosh around to the right of the ball. And make sure you look at not only your objects turbulance but the simulation's turbulance to get a good read. The scale i would say is your biggest issue. To counter that you might want to look at whether you have enough heat production. The Fuel and Temp settings are important in creating a larger flame. Fume is a great app its just finding the balance.

If you have a newer test i would love to see it.

Mark

[Daniel-B]

Does the scale of the object affect the look of the fire? Or is FumeFX scale independant? That might be part of the issue.

[TimWoods]

not if everything is scaled in proportion. i.e bigger forces etc. but its a good idea to build your sim at 1:1 size, then you can get a better appreciatiion of the forces, impact areas, smoke spread etc.

[Luxo-Jr]

First of all thanks everyone for the assistance and help.
It turns out in the end the scale and rendering iterations had a lot of influence on how the fire behaved and looked.
Here's a few random shots of the end result that is close to what I have in mind. It's a work in progress at the moment.
Cheers everyone!

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