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View Full Version : Aurorae effect in After Effects, how though in LW?!



focus3d
03-25-2008, 08:05 AM
I followed a tutorial and created the following video in After Effects, which looks great, but what I'd love to be able to do is actually fly through the aurorae, not quite so easy in AE.

http://assets.northcolour.com/ncab2.mov

Can anyone give me a clue how I'd achieve this effect using Lightwave? It's kinda like a volumetric light shining from a procedural texture, I can't get my head round how it can be done.

Any help greatly appreciated!

prometheus
03-25-2008, 01:29 PM
I would probably use a null or a couple of nulls slightly offset from eachother
and use hypervoxels sprites on those..make sure you make the particle size big enough to cover the sky and stretch the hv on y axis a bit and also rotate the null on the banking channel to get the angle you want.

Theres alot more to it of course..setting the right hypertexture scale and colors and so on..but try turbulence and use the null as reference, then use displace texture effect on a low value preferably, If you then rotate the null on the heading channel at a keyframe somewhere in the timeline, you will get a nice effect.

You can ofcours set it up in texture environment or simply use procedurals on geometry and also displace that geometry with a procedural and animate it to get the aurora motion.

I donīt have time to show you something right know perhaps tomorrow.

focus3d
03-25-2008, 03:29 PM
I would probably use a null or a couple of nulls slightly offset from eachother
and use hypervoxels sprites on those..make sure you make the particle size big enough to cover the sky and stretch the hv on y axis a bit and also rotate the null on the banking channel to get the angle you want.

Theres alot more to it of course..setting the right hypertexture scale and colors and so on..but try turbulence and use the null as reference, then use displace texture effect on a low value preferably, If you then rotate the null on the heading channel at a keyframe somewhere in the timeline, you will get a nice effect.

You can ofcours set it up in texture environment or simply use procedurals on geometry and also displace that geometry with a procedural and animate it to get the aurora motion.

I donīt have time to show you something right know perhaps tomorrow.

Wow, I think I understood most of what you said there! I take it using volumetric hypervoxels on an effect like this would take an eon to render?

Also I thought you couldn't use nulls on hypervoxels, I take it this is something new in 9.0? (which thankfully I do own btw).

Thanks for your explanation, although I am not entirely sure of how I'll approach it, you have given me a good start. :thumbsup:

prometheus
03-25-2008, 04:16 PM
Yeah..hv sprites can be very versatile, it depends. for gaseous things or thinner flames or nebulas and such..
you can check some other of my threads of nebulas and solar flares..

http://www.newtek.com/forums/attachment.php?attachmentid=55118&d=1203911813

if you canīt see the thumbnails image directly, check the sixth post from me here...
http://www.newtek.com/forums/showthread.php?t=79338&highlight=nebula

solar flares at spinquad, I have another name there phamarus.
http://www.spinquad.com/forums/showthread.php?t=21732

Heres some very quick dirty sample pic of aurora just showing some of the basic steps.
and yeah volumetric mode isnīt needed for these whispy things, and it would take a long time to render.
By the way voxels on nulls have been in lightwave for a long long time I think.

focus3d
03-25-2008, 04:34 PM
Yeah..hv sprites can be very versatile, it depends. for gaseous things or thinner flames or nebulas and such..
you can check some other of my threads of nebulas and solar flares..

http://www.newtek.com/forums/attachment.php?attachmentid=55118&d=1203911813

if you canīt see the thumbnails image directly, check the sixth post from me here...
http://www.newtek.com/forums/showthread.php?t=79338&highlight=nebula

solar flares at spinquad, I have another name there phamarus.
http://www.spinquad.com/forums/showthread.php?t=21732

Heres some very quick dirty sample pic of aurora just showing some of the basic steps.
and yeah volumetric mode isnīt needed for these whispy things, and it would take a long time to render.
By the way voxels on nulls have been in lightwave for a long long time I think.

Prometheus you are the man. Thanks so much for this headstart on the project. I shall keep you posted as I make my way through it. :thumbsup:

jin choung
03-31-2008, 11:25 PM
hmmmmm....

actually, i would have thought that flying through a aurora would be equivalent to flying through a rainbow -

the closer you get, the more it becomes nothing.

but if you're going for artistic license, that's cool.

also, i wonder if aurorae are "volumetric".... or whether in nature, they're very much like turbulent, deforming "cards" with an animated texture map on them.... in which case flying through them in after effects would be just like flying through them in real life....

but again, artistic license is valid.

jin

focus3d
04-01-2008, 05:44 AM
hmmmmm....

actually, i would have thought that flying through a aurora would be equivalent to flying through a rainbow -

the closer you get, the more it becomes nothing.

but if you're going for artistic license, that's cool.

also, i wonder if aurorae are "volumetric".... or whether in nature, they're very much like turbulent, deforming "cards" with an animated texture map on them.... in which case flying through them in after effects would be just like flying through them in real life....

but again, artistic license is valid.

jin

I have seen them a few times in real life and it's very tricky to say whether they are volumetric or not. They are so vast and blurred that it's hard to say whether they are 'cloud like'.

For this project however yes, I am not trying to create an aurorae simulator, but more an aurorae style effect.