You can redraw all and add new textures, but the geometric pattern of the original draw will be there.

Edited: Thanks Crush for correction!

But as the house geometry is a present element in most of all desings, it be allowed
(Unless you say everything is a rip from Euclid´s geometry draws).
On this case, the identify element on original draw (the upper part on the roof) was removed to can do a difference between both draws. All the other elements are similars.. most of houses have same structures (door, walls, windows, floor). The sizes, perspective and placement on map makes the real difference I think. It´s just a tile, not a entire map.