Looking to do realtime 3D, there's nothing really on the web that can do it.. well, but I'm sure tat will change in about 100 years....

I have found this:

Link: www.bunkspeed.com

Which is realtime-ish rendering with GIand all that jazz
And It's available to try for free.. for Mac too!

And now AutoDesk have some new interactive distributed realtime-ish rendering thing on It's way, difference being it can be tapped into via web browser, but that's only for like 1 person at a time access, not for a public website.

--

Looks like I can finally bake GI with Cinema4D R11
Though your forced to use the rather brute force QMC method, which is great quality at the expense of speed, below is a realtime example of it rendered in the editor. Naturally any surface you want baked will have to be uvmapped.



Unfortunately I only have the demo of R11 and thus bakes are not saved, making it useless, so I thought id at least have a go with it in R10 with It's inferior and very slow GI and got the following results:



And that's in realtime viewport above, bonus is if you select all the bake tags at once (as you must have one for each object) you can bake them all in one go and leave it overnight. Downside is... it will take all night

;-)

the above took about an hour. R11 promises to be much faster *fingers crossed*

Hopefully one day we'll have baking from Vray, it has been talked about, but could be a long long time away.