Does this not meen textures will not result in a ban?
VAC Enabled Games
Please see the Steam Store Valve Anti Cheat Enabled search term.
Valve games
The Valve Anti-Cheat system is enabled for servers displaying the Secured shield logo. Using custom skins, sounds or maps and playing multi-player mods which do not modify core .EXE and .DLL files will not result in a VAC ban