Animating Depth: Tweening Movement - Flash 3D: Animation, Interactivity, and Games - page 86

Figure 3.47 Scaling and adjusting brightness for each doorway
For each layer, the first keyframe (Figure 3.47, left image) gets tweened to the last
keyframe (right image). The applied motion tween changes the scale and brightness of
the image.
To create the look of a never-ending tunnel, the last keyframe in each layer is very
important. At this point in time, the dimensions and brightness of the doorway image
are identical to the first keyframe of the doorway one layer below. The movement and
brightness change created by the motion tween completes the illusion (Figure 3.48).
Figure 3.48 Running down a never-ending tunnel