OverlayType
===========

0x298		long		Land	//see Land values
0x29C		AnimType*	CellAnim
0x2A0		long		DamageLevels
0x2A4		long		Strength
0x2A8		bool		Wall
0x2A9		bool		Tiberium
0x2AA		bool		Crate
0x2AB		bool		CrateTrigger
0x2AC		bool		NoUseTileLandType
0x2AD		bool		IsVeinholeMonster
0x2AE		bool		IsVeins

0x2B0		bool		Explodes
0x2B1		bool		ChainReaction
0x2B2		bool		Overrides
0x2B3		bool		DrawFlat
0x2B4		bool		IsRubble
0x2B5		bool		IsARock
0x2B6		Color		RadarColor