[frik]

> I wonder how long before games start being developed for server side rendering.

Haven't you heard about Gaikai (now owned by Sony) that provided cloud-based gaming. https://en.wikipedia.org/wiki/Gaikai

The problem is latency. Now you have input latency from you wireless gamepad to/from your PC/console, the rendering loop CPU/GPU time and then also the latency of your network and the server CPU/GPU time. Good night. If you live in a big hub city near the cloud datacenter you can use it, or if you like slower paced games. But if you like to play Quake (read: very fast paced first person shooter action with 120+fps) forget dreaming about cloud streaming your games now!

[moonchrome]

Gakai isn't what I'm talking about tho - that's just hosting your gaming PC in the cloud.

Server side rendering would exploit the fact that all of your clients are using the same resources to render the game - so you only need to keep 1 instance of mesh x in memory and you can render it for all clients.

As I said below if you have shared instance worlds like MMO you can do much more sharing, you can have shared effects just like you have a shared simulation for clients - the effects can then be optimized for techniques that might not be viable on consumer hardware - for eg. you might have some sort of world space global illumination technique - like radiance transfer. These techniques aren't usually used because you need a lot of memory + processing power - but you can get server GPUs with >10 GB of memory and more in the future you could have one dedicated GPU that would just compute global illumination and then feed view specific data to each client view rendering thread.

It would completely change the way you render games - right now most effects are done screen space because it's faster (eg. deferred shading) but if you could share world scene state you could get a lot more fancy with world space effects. Also the rendering pipeline would need to be a lot more asynchronous to avoid latency (eg. global illumination could be a separate process that would sync occasionally and not every frame to avoid extra latency in a trade-off for lighting latency).

[overgard]

I think you're overestimating the impact of sharing resources... it wouldn't do much. Lets say you have 10 concurrent users on a machine, that means to keep everyone at 60 fps you need to be rendering at 600+fps. Even with a great graphics card running SLI etc/etc, having ~1.6ms budget you're not going to do much in terms of visual effects.

[swozey]

Yep, even on my gigabit internet and sitting smack dab in the middle of the USA (well, pretty far South, but centered) latency is still my achilles heel.

[0xffff2]

I'm pretty sure you would be much better off on either coast. The vast majority of game servers at least tend to be split between LA and the northeast.