Hi! Is there a way to have sub-macros inside my macros? The documentation suggests that this is indeed possible, but with the loss of routing layers for each hierarchy that one goes down: https://openlane.readthedocs.io/en/latest/usage/advanced_power_grid_control.html#macro-level This means I can't have an OpenRAM block inside my macro since OpenRAM already uses Metal 4, correct? Is there another way to connect macros to the PDN?

This is correct.

Thanks for confirming!