Increase culling radius

[adamplayer]

The culling system is still limiting the amount of data fed into remix. Ideally it would have about double the current distance behind the player camera.

[adamplayer]

The current modification disables the vischeck, so now all that's left is the chunks of map loaded into memory.

In order to expand the culling radius, we'll need to figure out how the map streamer works and how to increase the number of chunks it keeps in memory.