Csgo material wallhack

Hello everyone i have a few questions about material wallhack.


1.i heard material wallhacks will not get you vac banned is this true?

2.are material wall hacks detected on any servers or is this impossible?

3.do material wallhacks work on all maps? or just a few?

4.if you play with material wallhacks and don't play like you are wall hacking is it possible to play long times without been detected by any admins?


thanks in advance
any links to answer there questions are also appreciated :)