It only just became a problem… It may be due to some sort of LOD problem because when I go closer the weird green textures disappear.
It became a problem when I updated to 4.4.3
Bumping to get answer…
It’s weird… but I just closed down the engine, it recompiled all the shaders, and fixed the problem…
Maybe try to edit material so it recompile itself. For me it looks like GPU grabing texture from wrong address of memory
So i was right 
most likely shader was corrupted and used wrong address for texture. Converted to anwser