B-, Deep swamp bottom [ ground ]
BB, Mud without water [ ground ]
BM, Shallow swamp bottom[ ground ]
BO, Puddle / edge of water [ ground ]

C-, Mud dirt road [ ground ]
CA, Asphalt road [ ground  ]
CB, Concrete [ ground ]
CP, Dust dirt road [ ground ]

D-, Solid wood, thick [ ground  ]
DC, Solid wood inflammable [ ground ]
DD, Solid wood penetrable [ vertical ]
DK, Tree trunks [ vertical]
DL, Ashes [ ground ]
DN, squeaking thick wood [ ground ]
DO, Burnt wood [ ground ]
DP, Perforated (fence) [ vertical ]
DR, wattle/ baskets
DS, Wooden ceiling [ ceiling ]
DU, Narrow wood [ ANIMATIONS / ground ]
DV, Squeaking penetrable wood [ ground ]
DX, Auxiliary, transparent and penetrable wood
DY, Slippery tree bark
DZ, Ladder [ vertical ]

E-, Pottery, vases, ... [ Vertical ]
ED, Tiles [ ground ]
EZ, Broken pottery, splinters [ ground ]

F-, metal in general
FG, *** grenade
FW, *** weapon
FS, *** shell
FB, *** shell
FP, Thin metal sheet
FD, Pipe
FF, Full barrel
FJ, Jeep (crashing)
FE, Empty barrel
FO, Barb wire/fence [ vertical ]
FX, Barb wire/fence [ slow death / ground ]
FY, Slippery metal

H-, Water surface (no collisions) [ ground ]
HA, Water surface (no collisions) [ ground ]
HB, Muddy water (no collision) [ ground ]
HC, Water surface (no collisions) [ ground ]
HR, Rice fields [ ground ]

J-, Regular jungle[ ground ]
JD, Thick jungle [ ground ]
JK, Trees, shrubs [ vertical ]
JL, Leaves [ ground ]
JS, Treetop canopy [ ceiling ]
JX, Jungle [ lethal / ground ]

K-, Flat rock [ ground ]
KD, Flat rock [ kills immediately / ground]
KK, Slanted rock[ slippery / ground ]
KP, Sand [ ground ]
KQ, Rock ceiling [ ceiling ]
KR, Vertical rock[ vertical]
KS, Gravel[ ground ]
KX, Slanted rock [ Slow death / slippery / ground ]

PP, Sandbag

S-, small glass	[ vertical ]
SO, window [ vertical ]
SZ, Broken glass [ ground ]

T-, Short grass [ ground ]
TK, Grass and gravel [ ground ]
TR, Rice [ ground ]
TS, Straw
TV, Tall [ ground ]
TX, Short [ slippery / ground ]
TZ, Straw from below [ ceiling ]

V-, Deep water bottom [ ground ]
VM, Shallow water bottom [ ground ]
VO, puddle / edge of water [ ground ]

X-, Nothing
XK, Auxiliary rock
XD, auxiliary, transparent and penetrable wood
XB, backpack, first aid, medic bag, cloth
XM, flask, flashlight, knife, shovel, metal
XS, case, sheath, cloth
XR, radio, metal
XX, phones, plastic
XY, glasses, wristwatch, glass

YG, Rubber / tires
YI, Polythene
YL, Cloth [ Vertical]
YK, Mad cow
YO, Biomass
YP, Paper, no stains
YQ, Paper impenetrable, stains
YV, Upholstered

Z-, Wall [ vertical ]
ZB, Concrete [ Vertical ]
ZO, Weathered plaster [ Vertical ]
ZS, Plaster ceiling [ ceiling]
ZH, Wall of clay [ vertical ]
ZL, Wall of straw and clay [ vertical ]
ZK, Stone wall [ vertical ]

**
here you can write notes etc.