Another animation test I did at school in 2009. I made the whole thing in Flash CS3 (haha SO OLD AHHH).
One of the new features that came with CS3 was the Spray Brush. It created a randomly generated spray of a shape that you could choose. The tool was kind of interesting but mostly I found it annoying because it toggled on and off every time I pressed the hot key B for the Brush tool. I would be drawing a line, hit E really quick to erase, then press B again and suddenly spray dots all over my drawing. It was very easy to just undo the spray but it still was pretty irritating. (Eventually I realized you can disable the Spray Brush in the hot key preferences). I figured out though that you could set the Spray Brush to spray a pre-existing symbol, so for this test I animated a symbol comprised of some bubbles rising upwards. I then used the Spray Brush to create a ton of these bubble symbols at varying sizes. Lastly I selected a bunch of the symbols individually, flipped and scaled some, and had them start on different frames so that the animation wouldn’t look exactly the same on each bubble symbol. The end result was a really complicated bubble effect that looked kind of organic and cool. It also slowed down Flash a lot to process all those bubbles at once haha.
I could only find this really low-res render I made for a faculty review, unfortunately. I hope I find the original some day, it might be still on the server at school.
The opening animation for Dirty Pair: Project Eden (1986) is one of my favorite two minutes of animation at the moment. And according to ANN its by Koji Morimoto, who founded Studio 4°C and has worked on some of my other favorite animated films!