A brief description of the files in the FLATS directory.

BLACK	Flat black color (for use in "flatlit" areas).
BROWN	Flat brown color
DIRT1	Generic muddy earth.
FLRBOARD	Wooden floorboards.
GRAVEL	Grey rocks/gravel
GREY		Flat grey color.
I_*		This series of flats is for use in conjunction with
		the I_* series of textures, ie are all of an industrial
		theme. I_PLATE3 through to 6 are quite detailed for flats
		and so should not be used in large sectors.
L_*		This series is for use with the L_* series of textures - 
		Landscaping theme. L_GRND1 is bare earth, and each 
		additional flat has more and more grass until L_GRND4
		which is full grass. Each additionl flat meshes with the
		others so you can make graded areas of ground with patches
		of grass and bare dirt without the transition line being
		obvious. The L_GRND*B textures are the same, but brighter,
		designed for ground in dark (nightime) wads.
M_*		This series is for use with the M_* series of textures -
		Mining theme. 
PEBBLES	Grey/brown gravel/pebbles
STONE1	Hewn stone, could also be used for concrete
STONE1A-C For use with STONE1, graded texture for simulating a 
		nearby light source.
T_*		This series is for use with the T_* series of textures -
		inTerior theme.
WHITE	Flat white color.