Guild Wars 2

So, this has only come about recently, every now and then random things become green and blue, when they really shouldn’t be,
i didn’t take much notice until a whole room became green and blue!!
then i started to question what was going on!
take a look for yourself!

My first two guesses would be either a temperature issue with your graphics card, or perhaps damaged game files related to lighting or particle effects that running “-repair” might help solve.