Match move dolly

Today we learnt about 'match move dolly', before we begun the tutorial we learnt about the parallax theory and how it works with 3D match moving.

The first thing we done to begin this tutorial was open after effects and making a new composition, we then imported the given files from the 'match move dolly' folder. We then had to key out the actress using the rotobrush tool, the way this works is you have to paint around the item that you're attempting to rotoscope and the after effects will select the item you've painted around. Once we were happy with the rotoscope we dragged the '>>>' sign so the work area would match the full length of the composition. We then selected the 'clip freeze' option to save our rotoscope so it would not be lost. We then had to apply the invert effect to the 'match move dolly' layer and change the RGB option on the effect to ALPHA. Once this had been completed we opened the match move dolly in a separate composition window, we then selected the 3D camera tracker effect and dragged it onto the separate composition. Once the effect had finished analysing there were several 'X' marked tracker points across the composition, we made them bigger so it would be easier to select them, to achieve this we used the track point size option. We then had to create a 'plane of view' by selecting all of the track points of the floor, once we had selected all of the points on the floor (not including the ones on the actress as she was not part of the floor) we created a new 3D camera and 3D null object, the 3D null will now operate on the X,Y and Z axis alongside the composition and was now match moved. We now had to make a reference for the floor and to do this we created solid and selected the matte painter option and made the solid black, we then selected the layer and applied the grid effect to it, and then made the layer 3D by selecting to box next to the layer. We then parented the grid layer to the floor null, this the appeared underneath the actress. We then re-scaled the black grid so it filled the floor underneath the actress. We then had to remove the background using the 'keylight' effect. To use this effect you can use a colour picker to select the intended colour you want removed and after effects will do this. The scene was now completely black, we then had to turn off the invert effect that had been applied to the actress using the FX box. We then re-ordered the layers so that the actress would not appear underneath the floor. The next job we had to do was create a floor, we imported the Gravel.PNG file, we then dragged it to the top of the order of layers and make it a 3D layer and parent it to the floor null, this was now completed and the floor was done. To add a sense of realism to the scene we added an artificial light to the composition. Once this was done i added an extra background to the composition before finally rendering the composition and uploading to youtube.