Thanks for the comment.
As for the B/W, it is to show what a colorful flower would be like if the color is taken away.
BTW, have you noticed that the stamen in the center appears to be "floating", as if "detached" from the flower? It looks like an Alien Spacecraft flying out of the Darkness of Space?
Is this legal where you live? Or do you need to register the paint work? In some countries there are regulations on what you can or cannot paint on your car.
"pencil sketch overlay"? Not sure what that is. I did a bit of "High Definition" to highlight the sharp, angular edges of the buildings to contrast them with the fractal configurations of the rain trees; a kind of interplay of the ultra urban setting of metropolitan Singapore and the old colonial one as represented by the gigantic, immaculate lawn of the playing field, which is a classic feature of all British colonies everywhere.