Version 1.5.0 comes with the long promised copper rub out feature. That’s an additional step which you can choose to perform after insulation milling (it’s skipped by default – check the new Copper rub out section in the Settings to turn it on).

As opposed to insulation milling, which simply isolates traces on the copper layer, this step completely removes copper from the places on the board, where it’s not supposed to be according to the layout. This is often required in circuits, involving radio frequencies or high voltages – unconnected copper alters electrical features of the board in undesired way.

The implementation may not win the prettiest algorithm contest. It might not be the fastest algorithm on Earth either. But at least it’s here today and it gets the job done. We’ll address algorithm inefficiencies later down the road.