Coral was a monumental task because it had to permeate most levels and it also had to progressively "grow" throughout the game. To make matter worse is that it also had to be cheap as possible which proved rather difficult given that the design itself was transparent.
My solution ended up being very basic and relying on texture work and vertex colors. The material is two textures blending together scrolling at different rates. with a bit of vertex deformation added in to give it slight movement. Very basic but was effective.
The Coral technically had 3 stages of progression throughout the game progressively growing then a last phase which activates once the player activates a certain device alters the state of the coral.
Prey: Coral Idling