Matser Compatabilty between Bold and Thin

Hi guys ,

I am trying to create two mater weights (thin and heavy) to them create a bunch on in between instances . Some characters are basically impossible to make compatible due to the drastic difference in weight I have to add more points in occasion .take this B for example - in Bold it has two circles inside it, but in thin these circle naturally disappear as the the typefaces gets thinner. This is happening often throughout my typeface. How do I make such a typeface compatible ? I am sure there is a way

thanks !

You do it by making alternate layers (aka. bracket switching layers).

This great thanks a lot appreciated