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reversed shine effect ..like rays going from projector projecting to screen

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mirek
reversed shine effect ..like rays going from projector projecting to screen
on Nov 6, 2006 at 10:45:59 am

Hi ,
I am willing to make an effect simulating rays going from one point (cine-projector) and projecting an image.
It might look like trapcode shine or light burst but reversed , I was trying to reach my goal by scaling down original (projected screen) and then apply light burst , but it does not look like coming from one point and does not exactly match the image projected.. I tried also radial blur but its still not what I expected....
Has anyone idea or can anyone redirect me to any plugin which can help me pls ???????
Thanx in advance


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payton
Re: reversed shine effect ..like rays going from projector projecting to screen
on Nov 6, 2006 at 12:33:59 pm

shine is a good plugin for this job.
is the projecting light source out of frame or visible? if it will be visible you need to cheat a bit, cause when you scale the projected footage to a really tiny size, there will be nothing left to project for shine.

maybe thats why you are trying so hard to do it.

payton


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mirek
Re: reversed shine effect ..like rays going from projector projecting to screen
on Nov 6, 2006 at 12:48:10 pm

yeah...dads the problem...the shining source is at the bottom of screen and I need it to project some text on screen


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Roland R. Kahlenberg
Re: reversed shine effect ..like rays going from projector projecting to screen
on Nov 6, 2006 at 12:37:44 pm

You will want to llok at Trapcode's Lux for the job. Serge has a pretty good technique that uses AE's built-in Beam plugin - do a search for that at the COW.

HTH
Roland Kahlenberg
broadcastGEMs
customizable animated backdrops with Adobe After Effects project files


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mirek
Re: reversed shine effect ..like rays going from projector projecting to screen
on Nov 6, 2006 at 1:23:47 pm

do you remember what topic did it cover ? i did some search but had not found that post... ?


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payton
Re: reversed shine effect ..like rays going from projector projecting to screen
on Nov 6, 2006 at 2:09:43 pm

please post the link here if you found it.
im pretty curious how to force lux to pick up a layers color for simulating projection. cant imagine how to do that.
thanks,
payton


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Filip Vandueren
Re: reversed shine effect ..like rays going from projector projecting to screen
on Nov 6, 2006 at 11:47:07 pm

the threads discussed are these I think:

http://forums.creativecow.net/cgi-bin/new_read_post.cgi?forumid=2&postid=11...

http://forums.creativecow.net/cgi-bin/new_read_post.cgi?forumid=2&postid=78...

However this is just for fake a single coloured glowy lightcone using beam with some glow and Ball action for some dusty particles floating around in it.

No True Volumetric Light casting a projection.

You might be able to fake it using loads of 3d layers that become progressively larger and more transparant with a radial blur thrown in for smoothing


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Vincent Becquiot
Re: reversed shine effect ..like rays going from projector projecting to screen
on Nov 7, 2006 at 12:50:20 am

You could also play with Lux and fractal noise (on the Lux layer)

Vince


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yikesmikes
Re: reversed shine effect ..like rays going from projector projecting to screen
on Nov 7, 2006 at 1:03:40 am

Lux is the slick way to go, but if you


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yikesmikes
Re: reversed shine effect ..like rays going from projector projecting to screen
on Nov 7, 2006 at 1:52:33 am

For my other 2 cents, this is fast and gives you grading within the beam that match the layer being projected.

Dup your layer (was it text?)

To the dupped layer apply
CC Radial Fast Blur
Center: move up til it looks right
Zoom: Brightest (for text)
and
Distort Corner Pin. Pull the corners around to a tight projector and the other end to touch the original layer.

This might work for you, or maybe not, but at least it was quick and has the layer


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Filip Vandueren
Re: reversed shine effect ..like rays going from projector projecting to screen
on Nov 7, 2006 at 2:52:26 am

I've been meesing with this for a few hours and I've come up with a pretty convincing Volumetric Faker.

It has (still) some drawbacks (it gets too bright in some angles and too dark in others)), but it works.
Check it out:






the basics:

start with a 3d layer of your movie or precomp, think of it as the projection on a wall
and think of it's anchorpoint as the position of the projector.

You'll want to move the anchorpoint far away from the layer itself in the Z-axis.

add a camera to 'look at your projection' or maybe animate it.

Duplicate Camera and projection layer and precompose them.
you might want to pick whip all animated properties of the cam in the precomp to the cam in the original, so that when you alter your camera's animation in your original, the copy clones it.

Anyway, the trick is now to set up a lot of duplicates of the projection rangin in scale from 0-100 % (or less), that range in opacity from 100-0%. (I used some expressions for this)

Because the Anchorpoint represents the projector, simply scaling will result in 'intersections' of the lightbeam, it all automatically lines up.

So this gives us a kind of posterized Volumetric beam, if you will.

Add some Shine or Fast Radial Blur to that for smoothing, (the Center point of the Shine is set to the Anchorpoint of the layer using a layer space transformation expression), and you're practically done. Just change the mode of your precomp to "Add"


You can download a comp here to try it out:

http://www.vandueren.be/forumstuff/volumetric/


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yikesmikes
Re: reversed shine effect ..like rays going from projector projecting to screen
on Nov 7, 2006 at 3:13:52 am

Way cool, Filip.


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Vincent Becquiot
Re: reversed shine effect ..like rays going from projector projecting to screen
on Nov 7, 2006 at 5:30:58 am

You, my friend, have spent a lot of time on this ;)

Great results !!

Now, I'm sure Echospace could take care of that layer duplication, been trying to find a second use of that plug in ever since I bought it ;)

Vince


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Filip Vandueren
Re: reversed shine effect ..like rays going from projector projecting to screen
on Nov 7, 2006 at 12:42:54 pm

Don't own echospace, but in essence i've programmed it's functionality into my precomp:

mutliple echos scaling up and fading out. I put some sliders on a null to control spacing and fading decay, but I believe echospace does the same, so there you go: Trapcode is the answer to everything 8-)


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mirek
Re: reversed shine effect ..like rays going from projector projecting to screen
on Nov 7, 2006 at 11:24:55 am

one more question ...because I would like the projector to be place in bottom part can you please write me the expression used to duplicate and scale the layer projected
Thanx so far


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Filip Vandueren
Re: reversed shine effect ..like rays going from projector projecting to screen
on Nov 7, 2006 at 12:40:10 pm

Not sure what you mean,

do you mean that we are looking at the projection and the rays are originating from below us ?
Should work fine by just readjusting the position of the camera.

I tweaked the file some more to have greater resolution and have the projection end in a smaller dot than in the previous example.
The camera moves to a point you might find suitable, tweak it to your taste

Also, this one uses CCRadial Blur with a negative amount, so it's a bit more subtle, but the rays will never go further than the screen.

Lastly, as a test the beam copies all had Motion blur activated: that's something even most 3D apps won't do easily: motion blur on volumetrics: yeay !

the comp is up for grabs at:

http://www.vandueren.be/forumstuff/volumetric/fake%20volumetric_b.aep


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wim roegels
Re: reversed shine effect ..like rays going from projector projecting to screen
on May 27, 2010 at 8:55:35 pm

Hey Flip. It seems, that the link does not work anymore ... is there another option?


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Filip Vandueren
Re: reversed shine effect ..like rays going from projector projecting to screen
on Jul 5, 2010 at 12:23:08 am

All projects and images referenced here can now be found at:

http://users.telenet.be/Vandueren/forumstuff/volumetric/



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Tim Fast
Re: reversed shine effect ..like rays going from projector projecting to screen
on Jul 5, 2010 at 7:45:54 am

Sweet! Thank you very much, Filip! The video looks just great! Believe me, I've searched all over the internet but I couldn't find anything even close in quality to this solution.


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Ed Stables
Re: reversed shine effect ..like rays going from projector projecting to screen
on Jun 3, 2015 at 1:23:42 pm

Hi
I'm aware this was all a very long time ago, but does anyone still have a copy of the project? I am have been building my on as per Filip's instructions, but am starting to realise why he used expressions when offsetting the layers. Also wondered if in the interim any new solutions have been dreamt up.
Thank you
Ed


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