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Old 19th Dec 2007, 11:40 PM   #1
pnevai
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Default LightWave - Great Balls of fire tutorial Volumetric Lighting

Would you like to create this effect right within Lightwave? Well you can and what is best is that it is done with a trick of light. Volumetric light that is, so you can pass objects through it and animate it as well.

Here's how you do it.
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Last edited by Rigel : 20th Dec 2007 at 01:10 PM. Reason: fixed some typos
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Old 19th Dec 2007, 11:44 PM   #2
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OK while there are 4 lights shown in the scene you only need 2 to create the effect. They are both spot lights create one and the clone it. Spin the clone 180 degrees so it is pointing exactely in the other direction. Just set the lights up as you see in to properties panel. Light 3 in this case is the light facing the camera this would be your light number 2.
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Old 19th Dec 2007, 11:46 PM   #3
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Now it is time to create some texturing for the volumetric lighting, again just follow the settings as you see them in the attached screen shot.
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Old 19th Dec 2007, 11:48 PM   #4
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Almost done! now to set a gradient to control the effect feeding off the previous texture layer. set it up and hit render. By moving the camera around and playing a tad with the settings you can change the effect dramatically. Have fun.
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Old 20th Dec 2007, 01:20 PM   #5
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I didn't quite get the same results (probably my gradient settings).

Nice effect and thank you for sharing it.
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Old 20th Dec 2007, 06:09 PM   #6
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Alright a bit of an update. You create the first spotlight using the settings above. You then clone that light and spin it 180 degrees away from the camera. The rotate it on the B (bank axis) Axis 90 degrees. Make the cone angle wider around 45 degrees. This is to fill in some of the blank areas created with the camera facing light. The exact the text value gradient settings for both lights are.

0 is black 000.000.000 100% alpha
.170 black 000.000.000 100% alpha
.42 orange 255.128.064 100% alpha
.47 White 0.0.0 100% alpha
.70 black 000.000.000 100% apha
1.0 black 000.000.000 100% alpha

As I neglected to include them in the slides above.

The Specify Medium Option color was hard to read in the slides and shoul be set to 255.255.175

The effect is a bit different rendering in LW9 the origional was done in 7.5 so there seems to be a bit of a change in the rendering engine, but I am sure with a bit of tweaking the exact effect can be reproduced. But the above settings and instructions get you right in the ball park. Remember that the effect is changes when you move the camera closer or further away, or if the camera angle is changed from dead center. changing the cone angle or cone base changes the render as well. These basic settings open up a ton of wild effects just by playing with the different settings adjusted a bit away from the given values some make subtle changes and some create a completely different effect while still using the same basic texture and gradient settings.

Even switching the light quality settings give you significant different results. So have a blast a pretty impressive effect only needing two volumetric spot lights. You can get te same effect with only one but with the supplied settings the effect has some large unfilled spaces that you may or may not want the reverse facing light fills in some of those spaces with a different but coupled effect.
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Old 20th Dec 2007, 07:41 PM   #7
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Very cool! Will have to try it out.
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Old 20th Dec 2007, 09:22 PM   #8
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Just tweaking the slider to shift more orange into the back on the main (camera facing light) light Yeilded this.
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Old 20th Dec 2007, 09:59 PM   #9
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Alrighty then If you orient the lights so they face each other and put the camera in the middle, rather than having them point in opposite directions and having the camer face directly into one and at the back side of the other. You get the following effects.

They go from left to right. Camera angle on the left, the render on the right.
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Old 21st Dec 2007, 01:13 AM   #10
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Sweet! Doesn't look much like fire to me, but I'm definetly going to use that for an FTL effect. Great job!
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Old 21st Dec 2007, 04:46 AM   #11
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WOW!! That's very cool!

Thanks!
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Old 22nd Dec 2007, 04:48 PM   #12
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Nice tut! Like fire might look out in space.
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Old 4th Jan 2008, 05:37 PM   #13
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Made with this technique:



Makes an awesome FTL effect.
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Old 4th Jan 2008, 07:21 PM   #14
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Excellent tutorial, printed and ready to try tomorrow with a fresh head :-)

Many thanks
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Old 18th Jan 2008, 08:41 AM   #15
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cool :P
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Old 3rd Apr 2008, 04:41 AM   #16
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Cool tutorial but still too hard for me to make it :P
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Old 3rd Apr 2008, 12:42 PM   #17
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This is what I came up with but I modified my settings some. Instead of 2 spot lights I used 2 point lights with a volumetric radius of 10'. Also setup the texture size of one light to half that of the other.
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Old 26th Jun 2008, 04:44 PM   #18
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Great tutorial! Gonna try this technique out!
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Old 30th Jun 2008, 07:15 PM   #19
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Very nice, awesome infact! I've gotta try this out,
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Old 3rd Jul 2008, 01:15 PM   #20
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Awesome!!
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Old 3rd Jul 2008, 01:53 PM   #21
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Whizzer!
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Old 17th Sep 2008, 12:57 AM   #22
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Good to know. Thanks fo the info.
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Old 10th Oct 2008, 01:48 AM   #23
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wow awesome effects

How did you ever come up with thiis Idea ???

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Old 29th Nov 2008, 07:03 PM   #24
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Oh I just did this tutorial, I am new to volumetric lighting and it is amazing the results you can get! Thanks.
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Old 19th Mar 2010, 11:29 PM   #25
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Default Just the last part

Quote:
Originally Posted by pnevai View Post
Almost done! now to set a gradient to control the effect feeding off the previous texture layer. set it up and hit render. By moving the camera around and playing a tad with the settings you can change the effect dramatically. Have fun.

I didnt understand about moveing the camera and tad...
In my render appears just cicles with the right colors pos just circles.
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Old 21st Mar 2010, 12:38 AM   #26
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If I knew how to make a PDF of this I'd do it right honkin' now!
Excellent post.
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Old 21st Mar 2010, 08:08 AM   #27
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Quote:
Originally Posted by Mikala View Post
If I knew how to make a PDF of this I'd do it right honkin' now!
Excellent post.
All of your questions are easily answered, young grasshopper.

You download Open Office. Download the text and images from the tutorial. Paste everything into the Open Office word processor and arrange it so it looks really nice. Then go to the file menu and choose Save. There is an option in there to save it as a .pdf file.

That's how I did the Serenity tutorial.

Now, get to work!

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Old 21st Mar 2010, 08:56 AM   #28
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Quote:
Originally Posted by jtdoepke View Post
Sweet! Doesn't look much like fire to me, but I'm definetly going to use that for an FTL effect. Great job!
It's easy to make it look more like a fire or explosion.
All you have to do is, clone another version of the spot light facing the camera,
go to volumetric options and change the texture from turbulence to puffy clouds.
This way you will have the volume of fire, yet still keep the fluidic veins of fire towards the edges of flames.

To animate add nulls to scene, use them as reference objects and animate them to your liking....
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Old 21st Mar 2010, 08:59 AM   #29
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Ah, also use world coordinates .. otherwise it may look like textured polygons just moving around..
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Old 21st Mar 2010, 09:04 AM   #30
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Here is a quick test of 2 frames
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