Frozen landscape map with crashed corrupter has a black spike

[beng]

In 2.5 in the frozen landscape map with a crashed corrupter has a long black spike-shaped patch on the ground under the unbroken side fuselage of the corrupter. It is black like the area outside the map, but it works like ground. It should be white since it is a snow map.

[ShipIt]

This is clearly not about the map. It´s a rendering problem caused by insufficient hardware or video driver (see http://ufoai.org/bugs/ufoalieninvasion/issues/4859).