On our team we have one level designer and one level artist. That makes two people who work together to create all of the content that goes into our singleplayer campaign. As a programmer, one of my top priorities is to create tools that can save our guys time. When it came time to redesign the viral infestation on the system, I took my time so that they did not need to.
The creep growth system in Retrovirus allows the designer to place infestation anywhere and it will dynamically generate tendrils that grow over the surface. The designer even has the power to modify many of the underlying variables governing the growth simulation allowing them change the thickness, density and other such properties of the vine-like growth.
Check out how quick and easy it is to add in infestation in one of our levels!