Weird graphics bug.

[KersatMG]

So, I am currently testing some custom assets, but sometimes a (kinda) frozen image of kerbins ocean appears and blocks my view. This still will then hunt me and the only way to get get rid of it is to restart the game.

Spoiler

Suddenly water appears over the horizon. Note that the VAB is partly obscured.

 

The water image moves with the camera but the shadow changes.

 

 Even in the main menu

At first, I thought it has something to do with leaving kerbin too fast because I noticed this first after a glitch catapulted me out of the kerbolar system with crazy speeds. But know it happened without such a glitch.

These are the mods I am currently using:

• UbioWeldingLtd
• Toolbar Controller
• Click Through Blocker
• Hangar Extender
• Module Manager Watch Dog
• Tweak Scale
• Hyper Edit
• Parallax / Parallax Stock Textures
• Textures Unlimited 
• Modular Flight Integrator
• Vessel Mover
• Final Frontier
• Texture Replacer
• Kopernicus
• (+ my own parts)

Do you have an idea what's causing this or how to remove it without a restart? 

All help appreciated!