I dunno if you also noticed, but in some of the earlier levels of Vertigo (particularly level 5) some of the matcens activate only once. What's curious, I know which cubes I need to find myself in to trigger each respective matcen, but I swear that in some cases the activation will only occur once. Are the matcens in Vertigo scripted to go off using three different cubes, activated once by each cube?
"I can almost feel that mechanical nightmare behind me, rolling around in its final throes of death... Then the orbital sky lights up like a sun... I start to breathe again."