There is definitely a need for core-Rendering power out there.
This would have real world industry and hobby level uses.
After some searching there seems to be a market for it with https://www.rendercore.com
Though their RenderCoin doesn't seem to a blockchain based currency, but a centralized e-currency like BitGold.
I'm probably going to start fiddling with a BOINC virtual box project and see if I can something going with Gridcoin, as I'm sure there's no need for a new Alt Coin.
BOINC might be a half-assed approach from a layperson, but it's probably all I'm capable of on my own - if that.
Anyways, food for thought I guess..
Note: If anyone does start rolling with this idea please involve me in some small way!
You may not want to use my code commits but I'm pretty damn good with graphics & logos, also I'd be the first to contribute cores to the project - and moniess
Good idea, but why restricting this to rendering? You could lease your all-purpose processing power and earn coins with it. I remember a project called Slicify which did that, but that also was a centralized service.