for this, i had only few rendered fishes as one layer. i´ve created the hole fishschool with one layer.
i had “reused” the same layer a lot of time and change color,speed, movements to create a believable crowd of fishes. in the final dome theater the crowd swim around the camera/viewer.
check out the shake tree
beastride raw-animation (work in progress)
battlefield crowd-animation-tests (work in progress)