[QUOTE=Mateos;483525]What do you mean by hidden? Under the surface? Will take time yes ^^’ You can caulk everything and maybe texture the visible surfaces again ^^"
You can always run a Brush Cleanup (icon around top left with 2 arrows pointing the back of each other) for malformed ones too 
Edit: Ninja’d![/QUOTE]
hidden…
I mean surfaces/brushes you cant see. (when you play)(they are inside walls under terrain… etc.)
but I’ve backup the map and then caulk every brush (no entities or clips) and start apply textures on the surfaces 
boobtools - what is that?
the gensurf I know… but boobtools?