Problem with assembly visualization

Hi!

Since yesterday I´m having some problems with the visualization of a big assembly. As you can see in the attached screenshot, I can see throught the parts as if they were overlaped (but all is properly assembled).However, when I isolate a sub-assembly, I can visualizate it perfectly.

I´ve also try to open diferents assemblies, and I only have the problem in one assembly. Because uf that, I think I´ve activate any kind of visualization mode with a shortcut.

Do you guys have any clue about what could I have activate, or how could I reverse it?

Attached 2 screenshots. One with the hole assemby and the weird visualization mode, the other one, same assembly, same position, just with one sub-assembly isolate.

Thank you very much!!

SolidworksAssemblies