How to modify Material instance have multiple parents

Development Rendering
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1

I my not a programmer and my english is terrible so maybe i cont make my point clear please gave me some patience （Thank you lOl）

I made a make a material which can creative four different material by use one id map.But four is not enough. Because i dont want make my material have lessness node.So,I want material instance have more than one parent and i can use id map make control which part is what material and i can add or reduce the parent number.

2

I don’t think it is possible for a material to have multiple parents.
However, you could switch between different materials in blueprint (if I understood the question).