Holographic projection (update 03.22.09: whole video tutorial page 2)

[weilynn]

Hi there,

Sometimes i'm working on this issue, how to model, texture and render a hologram ?
I already find an solution, that i like but i think it could be better

So,

I will give you a .blend, a texture, and screenshots (the animation will be on vimeo, on the Blender channel probably this week-end).

1) the scene:
http://clems.g.free.fr//tmp/hologram/man-scene.png

2) uv:
http://clems.g.free.fr//tmp/hologram/man-uv.png

3) alpha ipo:
http://clems.g.free.fr//tmp/hologram/man-alpha.png

4) compositing:
http://clems.g.free.fr//tmp/hologram/man-comp.png

5) render (composited):
http://clems.g.free.fr//tmp/hologram...ender-comp.png

It is better when it's animated (the alpha is better)

6) render (non-composited):
http://clems.g.free.fr//tmp/hologram/man-render.png

7) the texture:
http://clems.g.free.fr//tmp/hologram/hologramme-col.tga

8) .blend:
http://clems.g.free.fr//tmp/hologram/man-holo.blend


Hoping i'll like it or helps

BCNU for the animation, and probably timelapse...

[meschoyez]

wooow, it looks very well!! Thanks for sharing!

[weilynn]

You're welcome

Now available on vimeo and to download:

http://www.vimeo.com/1779558
http://clems.g.free.fr/misc.html

[blenderman345]

Would this work if you took a real human and surrounded him with greenscreen, replaced with black in GIMP? Or Blender I mean, or Pinnacle for Black? Then run this effect? I will run tests soon.

[+'´¯)BonE(¯`'+]

blenderman345: Sadly, it wouldn't. When the camera looks at the model from an angle, the "stripes" don't go straight across, they "bend" according to the 3d shape. You can't get that information out of a picture....

[Sammaron]

that's pretty good but sure you could get the stipes not to bend (me thinks). Get the alpha map via compositing, then composite the stripes over it...wait...But then that would sillohuete...well, i bet there is a way....hmmm

[Nat]

Originally Posted by blenderman345 Would this work if you took a real human and surrounded him with greenscreen, replaced with black in GIMP? Or Blender I mean, or Pinnacle for Black? Then run this effect? I will run tests soon.

I was wondering the same thing...

...So I tried it out and it worked pretty well, I'll upload some images and a .blend soon

[blubernuget]

Thats dank dude

[Nat]

Attached are some tests renders I just made of the hologram effect used in the tutorial being used on a 2D image of Suzanne mapped to a plane.




I'll describe how to do it soon

(I would upload the blend but it's too big what would be the best place to upload to?)

[weilynn]

Thanks for comment

Actually I'm currently writing a tutorial, the effect became better. I added a heat effect under the man's feet and modified the lighting.

You can get a preview here:

http://clems.g.free.fr/tmp/holo.jpg

(the .blend is this version of the effect, but on the tutorial I will modify some things, probably the texturing...)

So, the .blend that you downloaded is not the final version.


BCNU blenderers

[guitarec]

I tried to download the mpegs from your website - but I don't know what codec to use to view them.

Could you help me out?

Many thanks,

Eric "GuitarEC"

[weilynn]

Originally Posted by guitarec I tried to download the mpegs from your website - but I don't know what codec to use to view them. Could you help me out? Many thanks, Eric "GuitarEC"

Actually the mpeg file(s) of my sites are not really good, I will create a new with a cleaner codec

[weilynn]

Hi there

I have finished this test, can't make better than this last video:

http://www.vimeo.com/1881167

But if anybody can, don't hesitate !

For this new version, i have modified the lighting and the compositing and added a heat effect over the man's feet.

here is the new compositing:

http://clems.g.free.fr/tmp/nodes-hologram.jpg


BCNU blenderers



weilynncg.

[weilynn]

NEWS:

Animated textures:

http://www.vimeo.com/1947239



Enjoy it

[Lord of the Rings Junkie]

It occurred to me that you could probably use this technique on deforming meshes by mapping the holo-texture using the object coordinates of an empty instead of using 'project from view'. Just a thought.

BTW I intend to try this out soon! Cool effect.

[Atom]

Thanks For Sharing!

An odd thing, however, all I get when I render with Composite turned on is a blank screen. Did anyone else expereince this output failure? All I changed was the output to a PNG sequence with RGBA. It renders fine in the window, but all I get is a black image when I try to view the frame.

[Lord of the Rings Junkie]

This might be because you have anti-aliasing turned on for your graphics card. Once the render is done, hit the 'A' key twice to toggle to alpha view and back - that should make the render show up.

[Atom]

Nope LOTRJ,

This BLEND file and node solution produces no output on Windows XP SP3 running Blender 2.48a. Yes, I can see the image in the Render window, but when I press F3 to save as PNG I get an empty file. Also if I just render the animation, I get all empty files.

How are you guys getting these pictures? Are you screen grabbing them?

Ah!
Because it is open EXR based, saving as PNG does not work. I saved as EXR and Photshop could see the image.
I still can't get an alpha out of this setup.

Ah Ha!
It is the Lens Distortion node on Windows. It fails to produce output. I removed the lens distortion node from the layout and I could save as PNG with an alpha.

[weilynn]

Oh guys! I've just seen this .blend is really old !

Many things have changed since I have shared this one (just watch the first and last render).

I'm not woeking on 2.48a, but I think it work well.

@Atom, did you try to change "FFMPEG" to "PNG" (or an other extension) ?

[Atom]

weilynn,

Yes I changed the render output type to PNG. As I mentioned above, the problem is in the lens distortion node, it does not work on Windows XP SP3 using Blender 2.48a.

I love this effect though, the lens distortion does not add much anyway so I am happy that I got a version of the effect working. I can also add the lens distortion in After Effects later if I really need it.