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Old June 24th, 2011, 02:43 PM   #1
Thunderstruck
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Default Jet,Turbo,Light,Flame Exhausts Tutorial

Bear with me. This is written from C4d. Our my original thinking of how to make them. Is my second ever TUT.

Just thought I would share How I did it though I am a newcomer(Very) to CG-3d apps. But have not really seen any tuts and the few posts I have seen were questions for or were defunct tuts (unavail.)


For like the Original Viper from TOS BSG this is how I did it. And another TUT after that for another light setup.
-this should translate though through most 3d apps I presume-

DEMO of Animation exhaust.





1. Start off with 1 parallel spotlight.make it visible light.
Set your radius and length for need. Set your falloff ( I used Linear
with a decay of 2 m) This is to keep the light from lighting up surrounding objects or withing that decay distance.












2. Set your Visibility attributes. Use Falloff to obtain how much of the length of Parallel spot to fade off from tip. Edge falloff is for width falloff. You can also apply a gradient to the light as I have.
Set your distances also if you have not.







NOW for the Turbos!


1. Create a second Light and make it a spotlight. Set to visible.
Set your angles to for how spread out it is.( you may need to position it further back than the Parallel spotlight to match up)














2. Set your Visibility attributes. Use Falloff to obtain how much of the length of spot to fade off from tip. Edge falloff is for width falloff. You can also apply a gradient to the light as I have.Set your distances also if you have not.









3. Add the Noise. Here are my settings. Velocity is Noise animation speed. Visibility scale is to set scaling for all 3 axis- X-Y-Z
Wind is the Direction per axis- X-Y-Z. and Wind velocity is the speed in those directions.











That's it for the Exhaust Turbos. I will add the next part as soon as I get the images made.
Don't forget you can animate-keyframe many parameters such as intensity etc to get effects.





Now for the Jet Flame exhaust I used on the MK II Viper Model.


--After watching seas.3 & 4 of re-imagined BSG, I noticed they used different types in different scenes/episodes. This is not a recreation of any but my own make for it.


Demo of Jet flame exhaust






The Setup. 3 lights and an altered cylinder.







Begin with Center light.I used shadow maps (Soft) so no need for Detailed falloff like Inverse sqare or linear. Here are the Attribute settings.(may need to add as an exclusion to other objects- in Scene tab of Light- to keep it from adding light to other objects in scene)








Next we will add a parallel spot light with these attributes. Be sure to set your distances/radius to fit your exhaust mesh.






Okay now we will duplicate the parallel spotlight and add these attributes, a gradient and noise with wind.
This will give the animated effect without keyframing.










Now for the streaks.

For this I used a cylinder primitive object.No caps used- Size it to fit your exhaust (radius) length make it 2x to 3x length you want for your streaks.With the front matching radius of your exhaust, you will want to downsize the cylinder at the far end- make object editable and use tool (loops selection to resize the end radius about 1/3 of the exhaust size.)






Next just adding material.

Starting with Luminance, you want to create a gradient map. A 2d U type. see images.
You will want to copy/duplicate this or add same image map to the alpha channel/settings.
















Then we add a transparency map to shorten/lengthen the streaks. see image.I also made another layer and added some noise to it.















Can also keyframe the offsets of the material to get the streaks to rotate or keyframing the transparency
gradient to lengthen/shorten the length of streaks.









If you got any questions PM me or add it to thread.
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Last edited by Thunderstruck; July 2nd, 2011 at 11:21 AM..
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Old August 18th, 2011, 10:05 AM   #2
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Default Re: Jet,Turbo,Light,Flame Exhausts Tutorial

very interesting!

I've been working hard on this myself, (with 3dsmax) but using particles and the rendering takes a day for a few second shot even on a really fast machine.

I might try this with lights as you suggest and volumetric fog.
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Old August 25th, 2011, 06:06 AM   #3
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Default Re: Jet,Turbo,Light,Flame Exhausts Tutorial

Lights can be very useful in place of particle system for a great many things.
Including fire. just takes some tweaking and trial and error also.

As always, a continuous learning experience.

I have done quite a few exhaust/thrusters other than these but hopefully these
can help someone- get on track.

Cant add all of them but, these I discovered by trial and error and may help someone.

Regards,

Randal R.
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Old February 11th, 2012, 10:23 AM   #4
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Default Re: Jet,Turbo,Light,Flame Exhausts Tutorial

In max you got the Fire option to use where you can choose between tendril and explosions .
Just make a simly sphere Gismo and hemisphere it .
Stretch the curve out.
the go to Envirement -Atmosphere and select the fire efffect option.

Pick the gismo then select Tendril
Tryout some flame settings and the detail of the flames
for animations ad a low Phase number s as you go.

Using particals slows down the rendering conciderably so this is a nice way around it

and if you need a nice lighting glow effect you can always insert a spotlight that is faced to the back or pointed towards the flames starting from the source.
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Old February 11th, 2012, 01:44 PM   #5
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Default Re: Jet,Turbo,Light,Flame Exhausts Tutorial

I've tried something like that, just did it again. It looks like a really nice natural gas/candle flame ha ha.

Any suggestions for settings to get it to look more like nitrogen gas spouting wildly? (how it looks in the show)

Thats why I settled on particles, it looks really close to the real deal:

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Old February 11th, 2012, 04:09 PM   #6
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Default Re: Jet,Turbo,Light,Flame Exhausts Tutorial

Well you could use shift and rotate to make a copy of that plume and put it at an angle , you would stilll use far less memory then the particals

the viper plume is hard to make in max thats for sure (without particals)

Particals is a easy way but it eats memory
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Old February 28th, 2012, 06:06 AM   #7
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Default Re: Jet,Turbo,Light,Flame Exhausts Tutorial

Thank you for this tuto, the second one works fine in Maya too for those who use this program. And it also can be use for the new galactica thrusters effect.
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Old June 11th, 2014, 10:36 PM   #8
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Default Re: Jet,Turbo,Light,Flame Exhausts Tutorial

I have seen an effect in jet exhaust called "dancing diamonds" where the
exhaust stream has bright spots evenly spaced along the stream that look like
diamonds. See the link:

https://www.youtube.com/watch?v=KeGidtk6t2Y

I was told this is the sign of a correctly working jet or rocket engine so I would
think adding this effect would be more realistic.
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