In couple of words:
Each original magic art piece is created on the basis of runic (Norse|Scandinavian) or Kabbalistic (Middle-East|pre-Semitic) symbolism, and the composition of the painting is a semantic field - an entrance to the definite space of the Forces. The picture and its secret layers form a contract with Spiritual Creatures, primary and secondary Assistants, who will fulfill the tasks for the Owner|Operator of the Magic Art Piece.