You are viewing an archive of the old fxhome.com forums. The community has since moved to hitfilm.com.

particle gaps fire trails [ANSWER]

Posted: Tue, 19th Feb 2008, 12:52pm

Post 1 of 9

Condornojoeg2

Force: 0 | Joined: 9th Feb 2008 | Posts: 13

Member

im trying to create a lasting trail of particle without any gaps between each blob of particle.

much like the old iPod adverts with the light trails
Posted: Tue, 19th Feb 2008, 10:30pm

Post 2 of 9

Darth Stazz the Powerful

Force: 2040 | Joined: 3rd Dec 2005 | Posts: 201

VisionLab User VideoWrap User FXpreset Maker Windows User MacOS User FXhome Movie Maker

Gold Member

what you might wanna try is increasing the particle rate or the speed randomizer. try those two and see if it helps
Posted: Wed, 20th Feb 2008, 8:35am

Post 3 of 9

Condornojoeg2

Force: 0 | Joined: 9th Feb 2008 | Posts: 13

Member

thanks, i tryed it but it seems to make the particles spawn seperate bursts. so i have about 2 flame particles that spawn about 2 smaller ones. i just want 1 continuous stream that looks like a neon stream
Posted: Thu, 21st Feb 2008, 7:14pm

Post 4 of 9

Darth Stazz the Powerful

Force: 2040 | Joined: 3rd Dec 2005 | Posts: 201

VisionLab User VideoWrap User FXpreset Maker Windows User MacOS User FXhome Movie Maker

Gold Member

you probably need to increase the particle max then. maybe too many particles are being formed and the program is saying "alright, we need to stop the emitter for a second so that some particles disappear"
Posted: Fri, 22nd Feb 2008, 11:26am

Post 5 of 9

Condornojoeg2

Force: 0 | Joined: 9th Feb 2008 | Posts: 13

Member

thanks for the help.

i've been palying around with some of the presets so i can figure out how they work.

It's all trail and error realy right?
Posted: Fri, 22nd Feb 2008, 12:26pm

Post 6 of 9

JackPot

Force: 10109 | Joined: 3rd Oct 2005 | Posts: 384

VisionLab User VideoWrap User PhotoKey 3 Pro User MuzzlePlug User PowerPlug User FXpreset Maker Windows User MacOS User

Gold Member

Rating: +1

Hi,

The problem is that the particle system only spawns particles per frame. So if your movement is fast you will get gaps in the trail.

There is a work around, but it involves a lot of trail and error. I have tried to recreate a simple version of the IPod trail you stated as an example. http://www.youtube.com/watch?v=L0OC48dx20o See that video at time 0:08 for the trails.

If I try to create a fast trail I get big gaps because particles are only emmited each frame:
http://jack.fxhome.com/movies/ParticleGaps/

To fix this problem you have to create a slower version of the effect then speed it up.

Firstly I created a really slowed down version of the effect and exported as a mov file:
http://jack.fxhome.com/movies/ParticleSlow/

I then reimported the mov and set the speed of the movie ten times faster:
http://jack.fxhome.com/movies/ParticleFast/

Voila no gaps. I also added some blur to that particular effect.
Posted: Mon, 25th Feb 2008, 8:35am

Post 7 of 9

Condornojoeg2

Force: 0 | Joined: 9th Feb 2008 | Posts: 13

Member

cool, so im guessing if i make the length of the clip longer i can have a smoother effect. then with added effects make the duration of the clip the same as the originl video
Posted: Mon, 25th Feb 2008, 8:56am

Post 8 of 9

JackPot

Force: 10109 | Joined: 3rd Oct 2005 | Posts: 384

VisionLab User VideoWrap User PhotoKey 3 Pro User MuzzlePlug User PowerPlug User FXpreset Maker Windows User MacOS User

Gold Member

Yeah something like that. You might have to do some calculations to work out how slow to make it, but you should get it working with some trial and error.

Upload you clip to youtube when your done, I would be interested in the results.
Posted: Mon, 25th Feb 2008, 9:29am

Post 9 of 9

Condornojoeg2

Force: 0 | Joined: 9th Feb 2008 | Posts: 13

Member

will do.

I did some laser effects last weeks which came out ok. lasers, sparks and smoke all added to the finished product.


will be filming a short vid soon with all the effects i'm hoping to do