organic buildings

Very weird and interesting. The upper left looks like an earth tree was infested with an alien fungus, and it is steadily digesting the wood. The upper right looks like it grew up to grab something man-made (the straight lines), for more light, support, or food.

The big thing in the center is the expansion phase of the fungus, as it spreads out to convert the nearby bio matter into alien fungus as fast as possible. The bottom row looks like the fungus has gathered all the available biomatter, and is growing a stalk to release spores once again.