We’ve seen this done before with stickers but this slash in the bonnet with the monster eye peering through is actually sprayed art.
This whole BMW has had a radical restyle from the headlight conversion to the custom front vent. It is probably the removal of the BMW grill which does most to hide the real identity of this car. The slash paint effect continues on to the rear of the car as you can see from the image below. The rear light cluster have also been painted to blend in with the rest of the car but only slightly so that the original bulb colours show through.
Add a massive rear spoiler with high level brake light and then fit a very large and unsual shaped exhaust and you have a cool show car on your hands.