UNK = UNKNOWN
Flag 0 - From room to room
Flag 1 - Hide inside from outside
Flag 2 - Hide outside from inside
Flag 3 - Mirror Flag
Flag 4 - Extra Bloom
Flag 5 - UNK
Flag 6 - Use Exterior LOD
Flag 7 - Hide interior when door is closed.
Flag 8 - UNK
Flag 9 - Mirror exterior portals.
Flag 10 - UNK
Flag 11 - Mirror Limbo Entities
Flag 12 - UNK
Flag 13 - UNK
Flag 14 - Disable Farclipping