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Old 05-17-2013, 04:46 PM   #1
sumchans
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Sumesh Chandran
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How to make flames stick to the object?

Hi,


Here I have an object that acts as an emitter for FumeFX. I am just trying to make the flames stick to the object even when the object is animated. I want the flames to be tight on the object in a way we could make out the shape of the object.

The first image shows the flames on a fighter plane before the animation and the second one is when the fighter is animated. I don't want the flames to spread over as you see in the second image.



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Old 05-17-2013, 11:45 PM   #2
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A couple of things:

Link your grid to a helper that flows with the path of the object, enable grid motion. Save yourself some voxels.

Increase sub-steps, inject a lot of fuel, dissipate temp quickly, burn speed to match scale (IE raise it), add a bunch of small turb, increase timescale, ect. That will get you started.

EDIT: oh and make you render object smaller than the emission object or vice versa.
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Last edited by JohnnyRandom : 05-18-2013 at 01:13 AM.
 
Old 05-18-2013, 10:23 AM   #3
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Thanks Johnny,

I see increasing the timescale raises up the flames and the increase in the temp dissipation, doesn't seem to have any effect at all. But the reducing the fuel amount value in the Obj/Src section did what I wanted.

Quote:
EDIT: oh and make you render object smaller than the emission object or vice versa.


Actually, I didn't get this one.
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Old 05-19-2013, 01:56 AM   #4
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When you dissipate temperature you have to set the actual min. temp to a usable number. Dissipating a temperature of 0.1 wont do anything when your range is a default of 300. For instance if you are injecting a temp of 300 and you want to taper your temp off you need a min. temp of something like 200 and a little diffusion.

Here, this you will understand. The fuel burns fast, the tendrils are created from turb, and the temp falls of pretty quickly. It is far from perfect, the turb duration could be longer and a few other tweaks but you'll get the idea.
Attached Files
File Type: zip max2011_FFX_ballOfFire.zip (25.2 KB, 5 views)
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Old 05-20-2013, 12:24 AM   #5
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That was nice explanation Johnny.

I am slowly getting it.
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Old 05-20-2013, 08:58 PM   #6
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The file you provided me helped a lot. Now I am getting it technically. Its always nice to receive help with example files.

Thanks a lot again.
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Old 05-21-2013, 06:14 PM   #7
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There is just way too much to try and explain. The only thing I don't like about providing examples is that I am doing all of the work for you, which is fine if you are learning something from it but bad juju if you use it as is.
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Old 05-21-2013, 07:04 PM   #8
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Oh no Johnny,

I wont ever use it as it is and I have never done that before too. My intention is to learn everything technically. Want to face interviews with confidence. The example file made me rethink on how to achieve the same effect in a different way. I was also confused when you were talking about the temp and range values, but the file clarified most of the things.

By the way that file felt damn real to me.

Thanks again.
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Old 05-21-2013, 07:04 PM   #9
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