A different tip you could keep in mind when mapping Photo-to-otbm, is to start with the basic shape of it and then mold outwards by stacking similar items. Regardless of color schemes matching up or not at the beginning, you at least learn how to play around with architecture more and it will always lead to new ideas as well.
Did this in about 20 mins just so you can get an idea, and I left it blank on purpose so anyone can pick it apart and look at the structure piece by piece. Again, this is just for ideas, and to kind of give an example of what
@Andréew was saying about adapting to the Tibia style more.
Also because I don't have many CiP sprites left in my spr so I was really "limiting myself," as some would say.