So we've been hard at work at implementing a custom icing simulation & rendition. Everything dynamic and done via shaders, of course.
Depiction of severe icing encounter. Inboard boot just inflated, so inboard leading edge is flaky as the ice flew off in chunks. Notice the ice isn't just a surface effect, it appreciably increases the thickness of the wing, as there are several inches of packed ice in this image:
The jagged leading edge in the following screenshot is due to ice crystal growth. This is what makes the wing stop behaving like a wing and instead gives it the refined aerodynamic qualities of a brick:
Any exposed sharp edges and point-like structures are prime ice accumulation space:
Including wing leading edges, strakes, exposed antenna housings and flap fairings:
While stationary on the ground, ice also tends to accumulate on the fuselage: