Answer:
there is no painting, bro
Explanation:
Not sure if this is what you need.... but....it is the teaching of the Catholic Church that in the Eucharist the appearance is quite unchanged, but the basic reality has become the body and blood of Christ.
The change from bread and wine to a presence of Christ that is true, real, and substantial is called transubstantiation.
I think what u are looking for is probably ---------Computer Science -----------