There are already a number of services that offer on-demand rendering so I assume studios that take on jobs too large for their current farm are already using t

There are already a number of services that offer on-demand rendering so I assume studios that take on jobs too large for their current farm are already using them. Where I work we often use spare workstations (rendering is a fraction of our workforce) on off hours to process large jobs but have been looking at EC2 options for a while. If there were a service that provided a ready to go solution on EC2 for 3dsmax/Vray, I'd have to take a close look at it.