Can you turn off rendering of a neighboring region?

I've looked through the Wiki but can't quite find this information.

We have a large virtual sports activity and some time ago, we moved two sims together so that we can have spectators on one sim, and the game on the next. This REALLY helped with lag. However, we do still get complaints from a couple players that their computer is using up a lot of energy rendering the spectators on the next sim.

Since it's on separate servers, my understanding is that the rendering cost should be minimum? I was first of the impression that, because it's on a different server entirely, it had no effect at all.

I found Wiki information on Avatar Delegate Child:

"Avatar Delegate Child
The endpoint within a region simulator that acts as the delegate for an avatar in a adjacent region, for purposes of sensing, and being heard, within the adjacent region. This might also be thought of as the agent's camera, in the region.

An Avatar Delegate Child:

* Acts as the point at which an avatar senses activity in region adjacent to its current region
* Provides a connection between the user's client, and the region hosting the avatar delegate child. "

So it sounds like avatars and objects on a neighboring sim can affect performance? To what extent? And is there a way you can de-render a neighboring sim or the avatars on it? I also looked through Debug settings and can't really find what I'm looking for there.

I think the best thing would be to tell them to turn down their draw distance.

For the most part, most of the players already do. We've learned over the seasons that you can as much as triple your FPS by turning off Rendering, all the way down to leaving Simple off (looks weird but works great for games). Then all graphics set as low as possible to play, including draw distance. Just mostly now looking at neighboring sims and avatars on them, if it IS a problem, then, any way to "turn them off"?

People have asked for that ability for years.

Take a photograph of a stand full of people, upload it as an opaque texture, put it on one side of a megaprim, with the other side transparent, and stick it 10m or so in front of the stands. Now object-object occlusion will keep the players from rendering the avatars in the stands.

Mighty Mental Mustelid Makes Mega! Film at eleven.

What Argent said. We do that with live theatre events where possible. It helps the actors tremendously.

Also turning down the draw distance does wonders, as others have said.