Step-by-step: Show rising bubbles in water

1 On the first keyframe of the object being submerged, block out the shape of the air bubble. Design a flowing abstract shape that stretches towards the surface. Strong variation is key for a realistically random design. Then add smaller bubbles coming off this main shape. 2 Break off the large areas of the major shape into large bubbles and have smaller areas disperse into groups of little bubbles. The object will continue to drag some of the air down as it falls so be sure to keep some smaller areas still attached to it. 3 The next step is to animate all of the small bubbles off the screen. No need to keyframe and in-between this stage: animate these bubbles straightahead. The bubbles follow an S- curving pattern with them, gradually becoming smaller until they disappear.