Forum Post: How to draw the bottom level instance layers in the present level

Hi, I am writing a program to get the overlapping area of the different layers. I wrote for the layers present in the heirarchy level successfully. But the problem is when there is an instance, for example I instanced a pcell in the layout and I drawn a rectangle of M1 over it now I need the overlapping area of M1 and the poly which is present in pcell. Can any one please help me how to draw the bottom level layers in the present level ? Can we done it using "dbHierPathTransform()" commands Thanks.