Textures bugged in Black Mesa

Excuse my bad english, I am french.
Hi everybody, I have a problem with my game textures : they are wrong or missing !
Black Mesa settings :
Models : High*
Textures : High*
Image quality : High*
Shadows : Low
Shaders : Medium (I think)
Color Correction : ON (can’t change)

Im also having this problem.

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.