It is the pictorial strategy which was invented in the Renaissance.
It is the Pictorial strategy which the painters called perspective.
Can the joining of the two sentences be like this:
It is the pictorial strategy, which the painters called perspective, which is invented in the Renaissance.
It sounds odd.
It is the pictorial strategy, which the painters called perspective, invented in the Renaissance.
Please help with the grammar rules of joining multiple dependent clauses in one single sentence using the comma.