Bro thank you

But I know how to work with C_CONTENT, that is not the thing I'm looking for, you can download the little demo made by me. I need in_passable to detect when player is in passable block (not hole player, just his feet). I can do for example just a simple c_trace under players feet with SCAN_TEXTURE, so if player is on "water" texture, then his walking speed is decreasing... but see, I want to do that only with in_passable, not with trace, not with C_CONTENT. Can you guys please help me how to figure this out?