4 Replies Latest reply on Mar 9, 2016 10:18 PM by armoose

    How to create a falling wall?

    armoose

      Hi I am trying to make an effect for a video I am doing. I would like to point out that I have only been using AE less than a year now so I am fairly new. I would appreciate the help. I am trying to make a videoscreen fall as if it were on a wall with a background. I am thinking about adding dust particles later when the video/wall hits the floor. But right now it just looks like a video screen falling, frankly a little fake. My objective is to make the video screen have some depth as if it were attached to a wall. And the falling to look as if it were really a wall falling. Right now it just looks too computerized. My worflow was basically 3 layers: background, videoscreen wall, and the foreground. I made the video screen a 3d layer and basically keyframe animated the position and x orientation for it to look as if it were falling. But I think it looks too fake. Are there any ideas out there to make this look real. Any tips suggestions or ideas is greatly appreciated, as I said I am a little new to AE, so I dont 100% know where to go. Thank you so much for the help.

       

      The test footage is provided below. How can I make it better.

       

      tset - YouTube

        • 1. Re: How to create a falling wall?
          Rick Gerard Adobe Community Professional & MVP

          The biggest problem I see is that the perspective and camera position do not match.

          Screen Shot 2016-03-07 at 5.50.54 AM.png

          Perspective is controlled by camera position. Focal length just crops the image. In the background shot the camera is just below the counter height about 10 inches and pretty well level. You are also shooting to the left of square to the back wall. The white thing laying against the wall and on the floor doesn't help either. What is that?

          Screen Shot 2016-03-07 at 5.56.40 AM.png

          In the starting shot the camera is a little higher and it is shooting to the right of square to the back wall. Just having the image fall straight down with the center of rotation at the bottom of the frame is going to look wrong for two reasons. First the floor in the background shot doesn't meet the camera at the bottom of the frame, it meeds way below so you need to adjust the point of rotation so the layer looks like it's lined up with the actual floor. The point of rotation would be below the bottom of the frame and the distance from the camera would have to fairly closely match the distance from where you want the wall to end up in the final shot. You can probably fake it a by simply moving the anchor point to about 1/3 of the comp height below the bottom of the frame and then rotating the wall until it looks like it lines up with the floor.

           

          It might be easier to keep everything 2D and use corner pin to simulate the falling wall. You might be able to kind of line it up with the funny white thing laying against the wall.

           

          If I were starting this project I would plan my shots much better and make sure I matched camera position and angle in all shots. If I were working with stock footage or stock photos I'd try to pick some that match a little better and then do a falling and rotating thing with the garage shot so that it completely disappeared from the frame. Having a flat shot of the garage lying on the floor of the house makes no visual sense to me.

          • 2. Re: How to create a falling wall?
            armoose Level 1

            Hey Rick thank you so much for taking the time to help me with this project. My apologies I should have said in the OP that this footage was a very crude test and by all means not the finished project at all. I uploaded a video below which might be a little better. But basically I feel that by just having the screen fall with the workflow that I did, it doesnt look like the video is attached to a wall falling. To try to dispel confusion. We are basically having the background fall because we want to set up a product with a certain type of background but that background falls to reveal a different background kinda like those really weird old spice commercials. Thank you for the advice about camera position it defintely helped with this test. But do you think my workflow above is the right workflow, just keyframing the position/x-orientation? would a green screen be better. I mainly want the video screen to look like it was attached to a wall, but I feel in my tests they have no depth and the falling is too perfect. I havent shot the final footage so this is all preperation.. Any help would be totally appreciated.

             

            This footage should be better, obviously not the final footage and still crude, my apologies,  I just want to get the fall and depth correct.

            tests - YouTube

             

            Again thanks for everything.

            • 3. Re: How to create a falling wall?
              Rick Gerard Adobe Community Professional & MVP

              I'm still not following you exactly. In the second example you have a wall that is close to the camera

              Screen Shot 2016-03-08 at 4.08.34 AM.png

              but the wall is not flat and not perfectly square to the camera. The shower is farther away than the door and there is a counter on the right and a wall on the right that give the image depth. Trying to make this wall fall in a convincing way is going to be impossible unless you model it in and then it won't look like a flat wall falling.

               

              The shot that is revealed has walls that are farther away from the camera and not at the same angle as the walls in the first shot.

              Screen Shot 2016-03-08 at 4.08.54 AM.png

              If you were to create a 3D set with the bathroom scene in-between the camera and the bedroom scene there would be no parallel walls. We expect walls to be parallel so even if this were a 3D set the falling wall would look odd.

               

              Now you really confuse me because your images don't match your statement about what you want to happen.

              armoose wrote:

               

              We are basically having the background fall because we want to set up a product with a certain type of background but that background falls to reveal a different background kinda like those really weird old spice commercials. . . .

               

              would a green screen be better.

              From this it sounds like you want the back wall to fall down revealing a new back wall rather than a wall between the camera and the back wall to fall down to reveal the scene.

               

              Either way, when you shoot your two shots you want the wall that will fall and the wall that will be left standing to be in the same position relative to the camera in both shots. If you want a wall that is about 5 feet from the camera to fall and reveal a wall that is 10 feet from the camera then you put the camera 5 feet from the camera when you shoot the first wall and put the camera 10 feet from the wall when you shoot the second and you make sure that the angle of both walls is the same. If the first wall is 20º from the camera then the second wall must also be 20º from the camera.

               

              If you want to have objects in the foreground like the guy in the old spice commercials then the easiest way to matte that element (actor) out is the use of green screen. Here again if you had the actor 5 feet from the camera and you wanted to move the wall that was 10 feet from the camera and behind the actor to reveal something that was 20 feet from the camera you would shoot all of these elements at the same distance from the camera that they would be in real life. This is the secret of composting. To make the perspective work and the illusion believable you have to position every element in your scene in the same relative position they would be if you shooting the shot for real.

              • 4. Re: How to create a falling wall?
                armoose Level 1

                Thanks for the advice Rick. Sounds like we are gonna have to match in the production. I just wanted to make sure my post workflow was the way to go. Sounds more like a practical effect than a visual one. Thanks for the help!