Does reflection of light by canopy need DX11?

[bienenbaer]

Oleg posted a BoB rendering of a Spitfire that showed the sun-light strongly reflected by the front-shield of the canopy. This seems to model early visibility of planes by reflected sun-light, which makes the game much more realistic.

Not strictly related to BoB, but I read that sightings of US planes by Luftwaffe pilots were often due to this effect (not from the canopy but from the silver fuselage), as were sightings of MiGs by US pilots over Korea.

If this was a game feature, would it need a DX10 or DX11 card to actually have it in game? (I heard Bob would not be OpenGL anymore)