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Schlanger Tamás
static starfield in 3d
on Oct 21, 2012 at 9:41:35 pm

Hello,

I usually don't need to work with particle emitter so I am not familiar with those.
But now I need to create a static starfield in 3d (global).
I know the Starfield in Library but I don't know how to stop it. Instead of the motion of the stars I'd like to move the camera.

Thanks,
Tamás
Motion 5


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Stuart Warrington
Re: static starfield in 3d
on Oct 22, 2012 at 9:36:28 am

Hi

I had a quick play a round and i think if you use the replicator then you can get a decent enough results. Make a circle
Replicate it
Make the group 3D and in the replicator options select 3D
Set it up to Replicate in box and to random fill not tile
Then just change the depth and the amount of points depending on how you want it.
This way is pretty render heavy though.

Stu


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Schlanger Tamás
Re: static starfield in 3d
on Oct 29, 2012 at 1:07:49 am

Hi Stuart,
Thanks, but it results 2d stars in 3d space.
Your solution results a quiet good effect so I will use it if I can not make 3d stars..

Anyway is it possible to make 3d starfield in global 3d?
I hoped I have just stop somehow the starfield in motion content (particle emitter)..
How to do?


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Simon Ubsdell
Re: static starfield in 3d
on Oct 29, 2012 at 1:26:27 pm

[Schlanger Tamás] "Anyway is it possible to make 3d starfield in global 3d?
I hoped I have just stop somehow the starfield in motion content (particle emitter)..
How to do?"


Motion particle systems are only fake 3D - if you look at them from the side they are completely flat 2D planes. They only create the illusion of depth through scaling the particles not actually moving in Z space.

Simon Ubsdell
http://www.tokyo-uk.com


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Mark Spencer
Re: static starfield in 3d
on Oct 29, 2012 at 1:28:07 pm

True but you can turn on global 3D so that those flat planes always turn to face the camera, creating the illusion that they have depth

--
Mark Spencer
Freelance Producer/Editor/Motion Graphics Artist
Apple-certified Master Trainer
Author, Motion 4 from Peachpit Press
http://www.applemotion.net


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Simon Ubsdell
Re: static starfield in 3d
on Oct 29, 2012 at 1:56:38 pm

[Mark Spencer] "True but you can turn on global 3D so that those flat planes always turn to face the camera, creating the illusion that they have depth"

Yes, indeed. But unless I'm being very dense (more than possible), I don't see that this will help the OP with his problem, will it?

I think he wants to move his camera around a frozen starfield, so this wouldn't work, would it?

Simon Ubsdell
http://www.tokyo-uk.com


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Mark Spencer
Re: static starfield in 3d
on Oct 29, 2012 at 2:07:39 pm

Sure it would - the stars would turn to face the camera, giving the illusion that they are spheres instead of flat discs.

--
Mark Spencer
Freelance Producer/Editor/Motion Graphics Artist
Apple-certified Master Trainer
Author, Motion 4 from Peachpit Press
http://www.applemotion.net


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Simon Ubsdell
Re: static starfield in 3d
on Oct 29, 2012 at 4:29:53 pm

[Mark Spencer] "Sure it would - the stars would turn to face the camera, giving the illusion that they are spheres instead of flat discs."

Yes, I know this but how would you "stop" the animation of the starfield emitter and achieve the same result, which was the original question?

Simon Ubsdell
http://www.tokyo-uk.com


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Mark Spencer
Re: static starfield in 3d
on Oct 29, 2012 at 4:35:27 pm

You could stop it several ways - I like to add the Drag behavior and keyframe it to create a "bullet-time" freeze effect - you stop the emitter, then swing the camera around.

--
Mark Spencer
Freelance Producer/Editor/Motion Graphics Artist
Apple-certified Master Trainer
Author, Motion 4 from Peachpit Press
http://www.applemotion.net


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Simon Ubsdell
Re: static starfield in 3d
on Oct 29, 2012 at 4:48:33 pm

[Mark Spencer] "You could stop it several ways - I like to add the Drag behavior and keyframe it to create a "bullet-time" freeze effect - you stop the emitter, then swing the camera around."

Very nice technique - works a treat. I'm glad I asked!

Many thanks.

Simon Ubsdell
http://www.tokyo-uk.com


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Rajesh Barnabas
Re: static starfield in 3d
on Jan 4, 2013 at 1:51:35 am

Can you be a bit more specific about using the Drag feature to stop the emitter. I can't seem to get it to work. I keyframed the Drag, didn't work. I keyframed the emitter, didn't work. I would like that static star field in 3d, like that bullet effect, that you spoke of. That would be awesome...just need a bit more specifics...thanks....


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Rajesh Barnabas
Re: static starfield in 3d
on Mar 18, 2013 at 10:48:27 pm

Seems like Mark answered my questions a while back at this message board:
https://discussions.apple.com/thread/1451945?start=0&tstart=0

Thanks...

I would just add that increasing the Drag amount would cause the emitter to stop sooner, which is what I was going for.

Here is the example I made:







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