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Glowy trails without plugins?
show user profile  Dejitarujin
I came up with an idea for a future project (read: take your time on this one), and I'll need a glowy trail effect. The trick is, I don't want to use plugins, because it's something I shouldn't need plugins for. I believe GhostTrails can do it, and I also found the free plugin "Trail" that creates precisely what I'm looking for. But, again, it shouldn't need plugins, and I need a great deal of control.

So, does anyone know a way to produce effects like seen here:http://www.lastjedioutpost.ru/Plug-ins/Trail/Examples.htm
in a manner that does not use video post or an external program, and is compatible with most third-party renderers? Particle Flow and MAXScript are perfectly acceptable.
~~~
Specialty: Non-organic modelling and effects.
Setup: 3D Studio 2010 with finalRender.
Rig: No, no I can't.
read 1060 times
4/26/2008 10:52:20 PM (last edit: 4/26/2008 10:52:20 PM)
show user profile  Joey Parker Jr.
are you looking to do a still image or an animation sequence?
 photo 2012-sig_small3_zpsbd114b69.png

read 1056 times
4/26/2008 10:59:51 PM (last edit: 4/26/2008 10:59:51 PM)
show user profile  Dejitarujin
Both, so let's go with animation. And the example on that page that most closely matches what I want to do is the first one. Kind of like those cell phone commercials, but I think those just use ridiculous camera exposure lengths or something.
~~~
Specialty: Non-organic modelling and effects.
Setup: 3D Studio 2010 with finalRender.
Rig: No, no I can't.
read 1049 times
4/26/2008 11:06:52 PM (last edit: 4/26/2008 11:06:52 PM)
show user profile  Joey Parker Jr.
pflow can do this
 photo 2012-sig_small3_zpsbd114b69.png

read 1039 times
4/26/2008 11:19:19 PM (last edit: 4/26/2008 11:19:19 PM)
show user profile  Dejitarujin
I figured as much - but how, exactly? The method I attempted once to make the trail fade caused the particles to become clear as they became smaller. I was using spheres with a falloff opacity map.
~~~
Specialty: Non-organic modelling and effects.
Setup: 3D Studio 2010 with finalRender.
Rig: No, no I can't.
read 1023 times
4/26/2008 11:59:13 PM (last edit: 4/26/2008 11:59:13 PM)
show user profile  Joey Parker Jr.
if i get time i'll try and get this to work
but it sounds like you're already on the right track.''
 photo 2012-sig_small3_zpsbd114b69.png

read 1020 times
4/27/2008 12:02:07 AM (last edit: 4/27/2008 12:02:07 AM)
show user profile  Haamu
using additive filtering (in material editor under extended parameters) gives some basic glowy/fading feel to the trail.

You can probably find several alternate methods/scripts in the particle flow forum on cgtalk http://forums.cgsociety.org/forumdisplay.php?f=206

Long time ago I did something similar, but used a pflow script to drag splines that had gradient fade. It looked a lot better for what I was after and rendered literally 100 times faster. You'll find similar stuf on the pflow discussion. http://koti.mbnet.fi/sinko/host/trail2.avi

read 980 times
4/27/2008 6:06:35 AM (last edit: 4/27/2008 6:06:35 AM)
show user profile  Dejitarujin
Holy... That's perfect! I can't believe I spent so much time looking for some additive blend ability, and it was right there, hidden in a rollout I don't go near. Combined with information from a YouTube video (it really does have a use!) that suggested using a particle age map I didn't know existed, I think I have exactly the effect I want... long before I have the models that will use it :P Thanks for the quick response, guys!

Proof of Concept - Glowy Trails
~~~
Specialty: Non-organic modelling and effects.
Setup: 3D Studio 2010 with finalRender.
Rig: No, no I can't.
read 948 times
4/27/2008 12:01:42 PM (last edit: 4/27/2008 12:01:42 PM)
show user profile  MrBurns
Could you quickly tell us how exactly you did that?
read 927 times
4/27/2008 2:52:20 PM (last edit: 4/27/2008 2:52:20 PM)
show user profile  Dejitarujin
Well, I'm not sure what's obvious and what's not, but here's the gist of it. Basic Particle Flow, with a gravity spacewarp. The original particles coming from the emitter are set to spawn new unmoving particles for every .75cm traveled (your units may vary).

The 100% self-illuminating Standard material on the trail particles has been set to additive transparency in its Extended Parameters rollout. It has a falloff transparency map, where the opaque center "white" has been replaced with a Particle Age map - from top to bottom, its grey shades are set to 128, 64, and 0, with the age percentage at 0%, 25%, and 100% respectively.

The trail color map is a more typical falloff, with orange on the inside and red on the outside (generally beyond where it's even opaque, it's pretty pointless). This is where I would actually make things a bit more advanced in practice, to make the trails change color slightly as the trail particles get older, and possibly put a stronger effect right near the origin particles.


Glowy Trails Project Screencap
~~~
Specialty: Non-organic modelling and effects.
Setup: 3D Studio 2010 with finalRender.
Rig: No, no I can't.
read 898 times
4/27/2008 7:28:31 PM (last edit: 4/27/2008 7:28:31 PM)
show user profile  MrBurns
Ah, thanks a lot!
I wasn't aware that you could spawn unmoving particles.
read 873 times
4/28/2008 6:14:03 AM (last edit: 4/28/2008 6:14:03 AM)
show user profile  Sypher-5
I'm a little lost, could you supply a sample scene ?
Signature Pending Redesign

read 842 times
4/28/2008 5:23:51 PM (last edit: 4/28/2008 5:23:51 PM)
show user profile  FJMSoft
Oh My! This is wonderful!
I was needing to make this, but I'm new to max and dont understand how to configure this, its much hard to you post step by step?

Thanks.
read 831 times
4/28/2008 7:14:55 PM (last edit: 4/28/2008 7:14:55 PM)
show user profile  Dejitarujin
Wow, I didn't think what I did was so interesting! I'll post more detailed instructions when I get home tomorrow - and, if someone tells me how, I'll supply the scene I used.
~~~
Specialty: Non-organic modelling and effects.
Setup: 3D Studio 2010 with finalRender.
Rig: No, no I can't.
read 819 times
4/28/2008 8:10:25 PM (last edit: 4/28/2008 8:10:25 PM)
show user profile  Sypher-5
Thanks to KB I'm playing with KY Trails, they seem alot faster and easier & uses particles. I'll try and post something when I get a render out.

Google translates the KY Trails site well enough for things to make sense.

If you want to upload, try Divshare, I'd still like to take a look :) Always better to know more than one way to skin a cat.

Edit:
Signature Pending Redesign

read 809 times
4/28/2008 9:08:14 PM (last edit: 4/28/2008 9:13:04 PM)
 
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