Introduction
Usually, when you wanted custom textures to use specific material sounds (for step- and hit-sounds) you'd have to replace a texture from halflife.wad with your own to get the material attribute according to materials.txt, or override material type using func_breakable material type. Since Sven Co-op 4.5, you can specify materials on your own textures using one of the following 12-character-prefixes:
VENTTEXTURE_
(Resilient metal/brass sounds)
DIRTTEXTURE_
(Dry dirt/sand/gravel sounds)
GRATETEXTURE
(Reverbing metal grate sounds)
METALTEXTURE
(Solid metal/steel sounds)
SLOSHTEXTURE
(Mud sounds)
TILETEXTURE_
(Squeeky plastic tile sounds)
WOODTEXTURE_
(Wooden planks sounds)
COMPTEXTURE_
(Fragile metal/plastic/electronics sounds (hits only))
GLASSTEXTURE
(Glass sounds (hits only))
FLESHTEXTURE
(Flesh sounds; sort of like trampling through a muddy puddle)
SNOWTEXTURE_
(Sound of crunching snow when walking over)