I was basically asking if the 01.dB resolution increases when rendering. Some plugins do this, like Melda which has realtime and offline Interpolation.

In other words... in realtime, that's fine just work with the 0.1dB resolution - but if I automate the volume between 1dB and 2dB does it "step" in 0.1dB increments x10, or does the resolution increase? Ie: 1.01dB --> 1.02dB --> 1.03dB.

Some plugins will even give you 3 digits and let you you automate within a thousandth of a dB - automating those give you the smoothest result.