NOTE: Described bits are for Backgrounds for B9 commands
If is object, you take value there (lower 32-bits) for B9 command, and perform VALUE = ((VALUE & 0x03F7FFFF) | 0xC4000000);

UNTEXTURED
-------------------------------------------------
Alpha < 0xFF
------------
TopFlag
B900031D00504DD8  AA, Z Compare, Image Read, force Blender, colour on coverage, decal, No FOG 
No TopFlag (Never found in game, I extrapolated it)
B900031D005049D8  AA, Z Compare, Image Read, force Blender, colour on coverage, transparent, No FOG

Alpha = 0xFF
------------
TopFlag
B900031D00502D58  AA, Z Compare, Image Read, force Blender, alpha coverage, decal, No FOG 
No Top Flag
B900031D00502078  AA, Z Compare, Z Update, Image Read, alpha coverage, Opaque, No FOG

FCFFFFFFFFFE793C  Shade

TEXTURED
-------------------------------------------------
Alpha = 0xFF
Transparent TopFlag
FOG*AFOG+CIN*1-A  CIN*AIN+CMEM*1-A      Conversion creates transparent close, opaque fogged far...
1100010000010000 0100100111011000 obj   conversion swaps decal for transparent, meaning obj is wrong
0000110000011000 0100110111011000 bg
B900031D0C184DD8	AA, Z Compare, Image Read, Force Blender, colour on Coverage, decal, FOG

Transparent No TopFlag
B900031D0C1849D8	AA, Z Compare, Image Read, force Blender, colour on coverage, transparent, FOG
TopFlag
B900031D0C192D58	AA, Z Compare, Image Read, force Blender, alpha coverage, decal, FOG 
No TopFlag
B900031D0C182078	AA, Z Compare, Z Update, Image Read, alpha coverage, Opaque, FOG

GS: FC26A0041FFC93FF	Trilinear Filter + Shade RGB
Paletted: FC26A0041F1093FF Trilinear filter + Shade RGB A 


TEXTURED
-------------------------------------------------
Alpha < 0xFF (Transparent too automatically??)
TopFlag
B900031D0C184DD8	AA, Z Compare, Image Read, Force Blender, colour on Coverage, decal, FOG
No TopFlag
B900031D0C1849D8	AA, Z Compare, Image Read, force Blender, colour on coverage, transparent, FOG

FC26A0041F1093FF 	Trilinear filter + Shade RGB A

WATER SPECIAL TEXTURES
-------------------------------------------------
B900031D00502078
Water Texture 5E4: FC127E24FFFFF9FC  Shade RGB A + Shade
Water Texture 5E7: FC121824FF33FFFF	Shade RGB A

Depot Detail Map:
B900031D0C182078	AA, Z Compare, Z Update, Image Read, alpha coverage, Opaque, FOG
FC26A0041F1093FF	Trilinear Filter + Shade
Surface Detail Map:
B900031D0C1849D8	AA, Z Compare, Image Read, force Blender, colour on coverage, transparent, FOG
FC26E4041F10FFFF	Trilinear filter + Mip-map0