So for a preview, this is what I'm working with atm:
Min: X:-242.8331 Y:-35.38999 Z:-275.6941, Max: X:308.5551 Y:515.9982 Z:275.6941
Index: 0000FFFF, pUnk02: 00000000, pPolyList: 00000000, pUnk03: 00000000, Node Type: Branch
Min: X:32.86096 Y:240.3041 Z:0, Max: X:308.5551 Y:515.9982 Z:275.6941
Index: 00000000, pUnk02: 00000000, pPolyList: 00000000, pUnk03: 00020FA8, Node Type: Leaf
Min: X:-242.8331 Y:240.3041 Z:0, Max: X:32.86096 Y:515.9982 Z:275.6941
Index: 00000001, pUnk02: 00000000, pPolyList: 00000000, pUnk03: 00020FC0, Node Type: Leaf
Min: X:32.86096 Y:240.3041 Z:-275.6941, Max: X:308.5551 Y:515.9982 Z:0
Index: 00000002, pUnk02: 00000000, pPolyList: 00000000, pUnk03: 00020FD8, Node Type: Leaf
Min: X:-242.8331 Y:240.3041 Z:-275.6941, Max: X:32.86096 Y:515.9982 Z:0
Index: 00000003, pUnk02: 00000000, pPolyList: 00000000, pUnk03: 00020FF0, Node Type: Leaf
Min: X:32.86096 Y:-35.38999 Z:0, Max: X:308.5551 Y:240.3041 Z:275.6941
Index: 00000004, pUnk02: 00000000, pPolyList: 00000000, pUnk03: 00000000, Node Type: Branch
Min: X:170.708 Y:102.4571 Z:137.847, Max: X:308.5551 Y:240.3041 Z:275.6941
Index: 00000000, pUnk02: 00000000, pPolyList: 00000000, pUnk03: 00021008, Node Type: Leaf
Min: X:32.86096 Y:102.4571 Z:137.847, Max: X:170.708 Y:240.3041 Z:275.6941
Index: 00000001, pUnk02: 00000000, pPolyList: 00000000, pUnk03: 00021020, Node Type: Leaf
Min: X:170.708 Y:102.4571 Z:0, Max: X:308.5551 Y:240.3041 Z:137.847
Index: 00000002, pUnk02: 00000000, pPolyList: 00000000, pUnk03: 00021038, Node Type: Leaf