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AE CS6 - Camera projection: avoid and overallped layer

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Simon Luchini Duca
AE CS6 - Camera projection: avoid and overallped layer
on Jan 3, 2013 at 2:56:03 pm

AE CS6 - Camera projection: avoid and overallped layer

Hallo Everybody,
I have selections from a photo and I displaced them to obtain a parallax effect, moving Camera. But we can seed a bad translucent(semi trasparent) effect the layers overlapped...
I tried to precompose or/and collapse every layers but nothing... but the layers continue to overlap in translucent. How can i avoid that?

many thanks!


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Simon Luchini Duca
Re: AE CS6 - Camera projection: avoid and overallped layer
on Jan 3, 2013 at 3:42:59 pm

I attach a screen shot:

http://img855.imageshack.us/i/cameraprojlayer.png/


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Simon Luchini Duca
Re: AE CS6 - Camera projection: avoid and overallped layer
on Jan 4, 2013 at 7:45:17 am

http://imageshack.us/a/img94/4146/screenshot20130103at746.png


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Tudor "Ted" Jelescu
Re: AE CS6 - Camera projection: avoid and overallped layer
on Jan 4, 2013 at 4:38:56 pm

I can't see from the images you posted how you build the image. For something like that you would need quite a few layers, with a lot of painting behind the shapes you cut, and even then it would be difficult to get the right effect because of the perspective. Can you post a few stills showing all the layers (cut outs) involved in building your scene?

Tudor "Ted" Jelescu
Senior VFX Artist


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Simon Luchini Duca
Re: AE CS6 - Camera projection: avoid and overallped layer
on Jan 5, 2013 at 9:20:07 am

Hi Ted,
how we know, for Camera Projection you have to put layer in front of a light to project them. And then use a Camera to visualize the right alignment. In my case, to obtain parallax (I'd like to move Camera just little...) I didn't project the entire photo but four selection of it. These four selection are displaced in Z Depth near in front of light in the right way to visualize the entire integral photo (but ar selections...!).
The problem is the if you make the same work with solid selections, whiteout projection, you of course don't have visible overlapping, but in the same time you can NOT make a 3D compositing and to obtain awesome parallax effect end camera movement. If you want make 3D compositing you have to project you 2d selection on plane or, better, over a 3D solid but in this case, in After Effects, I meet this problem about visible overlapping.

I Attach some further shots.






Many thanks!


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Tudor "Ted" Jelescu
Re: AE CS6 - Camera projection: avoid and overallped layer
on Jan 6, 2013 at 11:47:50 am

I do not think that you'll be able to mix the two techniques (if I understand correctly what you're trying to do). You either do a camera projection and give dimension in 3d space to your image by building a projection structure that is 3d, or you cut up your image and create the illusion of a 3d scene by arranging parts of the image in 3d (mainly on the z axis). Mixing the two will give you overlapping edges like in your image.

Tudor "Ted" Jelescu
Senior VFX Artist


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Simon Luchini Duca
Re: AE CS6 - Camera projection: avoid and overallped layer
on Jan 6, 2013 at 3:10:22 pm

Hi Ted,
yes is not possible, I think, but is strange cause this is the basic of3D compositing. Maybe you can make it in Nuke...
Anyway, I think there's a mistake to project single selections: we have to project just one entire photo in many planes, or better 3d geometry. But is hard to do in AE if you have complex geometry like a land or a mountains environment.
Maybe, if you don't have any possibilities to build 3D structure to give 3d effect to your projection, you can place your 2d selection in z Depth and use bump or displacement map to give them a 3D aspect.
Therefore I wait for your tutorial about create displacement map in Photoshop... eheheh!

Bye and many thx!


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Simon Luchini Duca
Re: AE CS6 - Camera projection: avoid and overallped layer
on Jan 7, 2013 at 7:16:32 am

But anyway, the really important thing when you use 2D layers to improve your 3D compositing is to give these 2D layer a 3D appearance.
In your tut "3D from 2D Image Using Displacement Maps", you improved the look of this other tut from Fuller " Advanced 2.5D Animation in AE " done just with 2D layer displaced in z Depth: this means give a real 3d look to 2d layers transforming 2d water spite layers in a "almost 3D layer using Freeform.
The question, therefore, is how to give a 3D look to improve 2d Layer2 (from a still image, of course). Foe water you used FreeForm but I think we could use some kind of map/pass as in a 3D sw, to make that: Bump Map, Displacement Map, Normal Map, AO, Specular... bit the problem is, how to make these Maps in AE (or in Photoshop o other external sw) and how to apply in AE these "3D maps" to 2 layers and render our 3D Compositing...
Any ideas?

Many thanks!


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Tudor "Ted" Jelescu
Re: AE CS6 - Camera projection: avoid and overallped layer
on Jan 7, 2013 at 1:57:58 pm

I am not aware of any other plugin that will do a true 3d displacement of the layer (fast and accurate) besides the Mettle plugins.
The basic principle of a displacement map is that 50% gray is a flat surfacelocated where your layer is in 3d space. Whatever is lighter than 50% gray will be extruded towards the camera, under 50% will be away from the camera. So you need to create a grayscale image that will allow the plugin to extrude your 2d image and give it depth.

Tudor "Ted" Jelescu
Senior VFX Artist


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Simon Luchini Duca
Re: AE CS6 - Camera projection: avoid and overallped layer
on Jan 8, 2013 at 7:52:01 am

Hi Ted,
great, this is the same process you have to use in Vue if you want to extrude a Geo Map photo: in Photoshop you have to transform you image in B&W (better if you set your image as Greyscale 16 bit) and than you have to create some different grey maps augmenting contrast. And is the same process to create displacemnt map in Maya from a 2D texture.
I still wonder how can we utilize also bump map and Normal Map (faster to render...) of this 2D layer. For example I've Crazy bump sw that creates easily many types of Maps and maybe Freeform can accept them as it accepts the grayscale Displacement map .

I'm going to finish your tut (applying displacement to surfer) and then I'll try to make further experiments to see if freeform can accept other types of Maps.
Many thanks!


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Tudor "Ted" Jelescu
Re: AE CS6 - Camera projection: avoid and overallped layer
on Jan 8, 2013 at 8:51:20 am

CrazyBump will help you get a Displacement map that you can use in FreeForm. All you need is to export the Displacement map in a image format(jpg, png, tiff...) that FreeForm can use.

Tudor "Ted" Jelescu
Senior VFX Artist


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Simon Luchini Duca
Re: AE CS6 - Camera projection: avoid and overallped layer
on Jan 8, 2013 at 9:01:40 am

Okay Ted, thanks,
but for your experince is better make Displacement map in CreazyBump and than save it in .tiff to utilize it in FreeForm or make Dispacement map in Photoshop?


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Tudor "Ted" Jelescu
Re: AE CS6 - Camera projection: avoid and overallped layer
on Jan 8, 2013 at 8:03:54 pm

I would say that it depends- CrazyBump may not be able to pick up on the actual displacement on certain images, like the one you have and then drawing them in psd is the way to go. I would test both and check the result.

Tudor "Ted" Jelescu
Senior VFX Artist


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Simon Luchini Duca
Re: AE CS6 - Camera projection: avoid and overallped layer
on Jan 9, 2013 at 7:37:37 am

Hi, Ted, I wrote you also in this post:
http://forums.creativecow.net/thread/2/1029873#1030476

My problem, shortly, is to understand what do you mean when you say " ...and then drawing them in psd is the way to go".
Help... please!


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Tudor "Ted" Jelescu
Re: AE CS6 - Camera projection: avoid and overallped layer
on Jan 9, 2013 at 10:22:01 am

For the image you posted there is unfortunately no simple way - here's what I would try using Adobe Illustrator to start with due to easier manipulation of shapes and gradients:
Draw boxes (3 sides- front, side and top- distorted to match perspective) for each building on separate layers to have easy access.
Fill in each side with a grayscale gradient.
Adjust the values of the gradients to have lighter at the top and darker at the bottom. The trick is to have the values go darker as the buildings recede.
Then you need a second set of gradients layered on top of the first with gradients following the angle of the perspective and a Overlay transfer mode to blend them with the first set of gradients.
Lastly you need to create a bottom layer with a gradient for the "floor" that starts with the lightest of the grayscale values from the bottom of the gradients for the buildings and ends with a significantly darker one.
Open in PSD then as a 32 bit file and save as tiff or png.
Work in AE @ 32bit.
Hope I managed to make sense - it's clear in my head but written down it may be a bit confusing.

Tudor "Ted" Jelescu
Senior VFX Artist


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Simon Luchini Duca
Re: AE CS6 - Camera projection: avoid and overallped layer
on Jan 9, 2013 at 10:41:29 am

Hi Ted,
Thanks, but I think we need a... tutorial.
Anyway I'm going to try to make it in a 3d software... I'll say you if and how does it works.
many thanks!


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Adam Meeks
Re: AE CS6 - Camera projection: avoid and overallped layer
on Aug 15, 2013 at 6:04:36 pm

I was having the same problem is AEcc~ But it was simple to fix: Make sure that your solid/grids Material Options are set to Accept Shadows, but Accept Lights needs to be off.


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Simon Luchini Duca
Re: AE CS6 - Camera projection: avoid and overallped layer
on Aug 16, 2013 at 5:19:21 am

Hi Adam,
Are you sure...?
I exactly didn't remember now but It's not possible have projection without light! So Accept light must be on!
If grid can't accept light it means It can accept the image projection (projected by light...).


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Mike Sev
Re: AE CS6 - Camera projection: avoid and overallped layer
on Feb 24, 2014 at 9:36:51 pm

hey Simon,
I realize this is a year later but I've made a tutorial on how to achieve true projection mapping onto 3D extruded shapes in After Effects CS6.

Tutorial:


Some examples:



Good luck!
Mike Sevigny


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Duca Simone Luchini
Re: AE CS6 - Camera projection: avoid and overallped layer
on Feb 25, 2014 at 5:11:35 am

Wow, finally a great solutions!
Very well!
But I make this work now in C4D by Camera Calibrator and Projection Man. You have total control on camera projection and you can export all in AE to composite. Really easer.


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Mike Sevigny
Re: AE CS6 - Camera projection: avoid and overallped layer
on Feb 25, 2014 at 2:43:54 pm

I will have to check that out. The C4D workflow is looking more and more attractive.. I used to work in Max when I was inhouse but those are pricy apps. I'm getting the C4D demo right now.

Thanks for replying,
Mike Sevigny


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