The BatchDrawCommandType that apply to draw commands in this draw range.
The value set here controls from which command array in BatchCullingOutputDrawCommands the range will read commands from.
A value of BatchDrawCommandType.Direct will read from BatchCullingOutputDrawCommands.drawCommands,
a value of BatchDrawCommandType.Indirect will read from BatchCullingOutputDrawCommands.indirectDrawCommands
and so on.