I was on my server, and suddenly my PC froze for about 5-10 seconds. Nothing would work (alt+tab, etc not working). After it unfroze my GMod textures had completely messed up. (See below photos)
Note: The interfaces work fine but are nearly impossible to use. Some props appear all messed up such as the oven prop, and the crosshair is completely missing. This entire problem also affects the steam overlay UI.
After restarting GMod everything restores back to normal.
Spawning an oven:
Evolve Admin menu: