Ironing

left: ironing
right: rectilinear

The ironing is a new top fill pattern. It combine two rectilinear path: a first coarse one at 90% flow and a second fine one with 10% flow ratio.

To have a nice ironing surface without "holes"> you must have the previous layer at the correct height. Solid layer over bridged (nothing or sparse infill under it) ones can be a bit too low. Up the "over-bridge flow ratio" to recover the correct height. A good value for it is between 1.15 and 1.3.

For a better finish, you can also use "only 1 perimeter on top layers", it wil remove the inner perimeter on top surface to let the space available for the ironing process.