• Adobe After Effects

  Generating a 3d panning effect from a stereo photograph

  Posted by Matthew Woods on November 14, 2006 at 4:29 pm

  In the past, I have done some cool 3d effects in After Effects by cutting up a 2d image into layers in photoshop, importing it into after effects, then moving those layers along the z axis, scaling them to their relative size, and doing camera moves on the resulting multiplane images. I am currently working on a project where we have some old stereo photographs as source material. I was wondering if anyone knows, or can think of a way, to create a similar effect from a stereo photograph. I am thinking there might be some trick where you do camera moves on the images and write a script to disolve between the left eye and right eye image depending on the camera position, but I’m not quite sure how that would work. Anyone have any ideas?

  -Matt

  Mylenium replied 19 years, 6 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Mylenium

  November 15, 2006 at 9:32 am

  Depends on what you want to use as a criterium for the transition. The simplest way would be to check the angle of the camera perpendicular to the images and then use a simple keyframe method like linear() or ease() to trigger the dissolve. Something like this might work:

  
  my_pos=comp(“main”).layer(“image”).position; //position of the layer with the images
  cam_pos=comp(“main”).layer(“camera”).position; //position of camera

  looksy=lookAt(my_pos,cam_pos); //orientation layer – camera
  angle=looksy[1]; //Y angle

  dissolve=linear(angle,0,30,0,100); //fade layer from 0 to 100 when angle is between 0 and 30

  [dissolve]

  This could be applied to the opacity of one of your segemnts in a pre-comp, making the top layer fade based on angle. I’m sure you could find more elegant methods using layer space transforms, but it should do.

  Mylenium

  [Pour Myl

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