Uberlods documentation

Uberlods are an optimization feature allowing us to switch multiple objects for one. This can potentially save thousands of drawcalls.

To create an uberlod these steps are required:

Create uberlod object for all the desired objects in 3ds Max.
Merge all uberlod nodes into one object (whole village, for example).
Place a special uberlod object into the level, set it's uberlod mesh and area and properties.

There are two types of uberlods that are done a bit differently:

Vegetation uberlods - used only for vegetation. Creation is somewhat automatic.
Brushes Uberlods - can be used for everything else. Requires more work but is more flexible.

Variable Name	Default Value	Description
e_UberlodSystemMode	0	0 - normal, automatic mode 1 - uberlods do not switch automatically (but they may finish whatever work they were doing at the moment or react to other commands)
e_UberlodDistanceMargin	16 (meters)	Uberlod switching has hysteresis. This means that in order for an uberlod with switching distance X to switch to the near state, observer must be X - e_UberlodDistanceMargin meters away from the uberlod and for the uberlod to switch to the far state, the observer must be X + e_UberlodDistanceMargin meters away from the uberlod. This is to prevent the uberlods to keep switching between the state in case the player happens to keep crossing the switching distance (in a fight, for example).
e_UberlodMinUpdateDistance	16 (meters)	Minimal distance an observer has to move in order for the uberlods to start updating their state.
e_UberlodDistanceRatio	3	Multiplier for the actual uberlod switching distance. Needs to be set before level load in order to work correctly.
e_UberlodUpdateBudget	2000	Uberlod system update budget. Limits the amount of work uberlod system does per frame.

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