CNC density and the edge of a hole

just wondering how the software works.

with stepdown - it will do 0.4 even if the stepdown is 1.0 (so it does it automatically)
with density - say your job is a arrowhead, if you set the density to 1 (i would never do this, but it is just an example), would the program automatically adjust the head to get right into the corners?
or alternatively - if the edges are not nice and smooth, would it smooth them on the final run?

i don’t think it would, but doesn’t hurt to ask.

will be changing to fusion and easel shortly, do these programs do it maybe?

just trying to speed up the job, finding out what is necessary - jobs take soooo long.