My eyes hurt, is this a cosplay?

If it is, it is 'shopped into looking like a painting.

Check out the artist's other works. He/she's just that good.

This is realistic enough to trigger the Uncanny Valley reaction on me.

The yellow sign on the left appears to say "wide"

Wiimeiser said:

The yellow sign on the left appears to say "wide"

It also may be "Guitar Hero". Note the daaashes.