@dsa-t I am trying the new features to export inner copper layers to 3D. It is really nice, but it would be very handy if it would have the option to export the dielectric layers as separate objects as well, for when complex layer stacks with different dielectrics are used.
A minor detail, after importing the STEP file into FreeCad I see that pads have a slight offset with respect to copper planes, as seen here:
Not sure whether this is intentional.