Flood selection tool

[Lostboysforever]

Hi

When I create a selection using the flood tool, everything looks fine, marching ants look good, i then paint a background around my selection, but some of the colours bleed through onto my selection,  when I look at the mask there are selections inside my selection that are not masked, shouldn't everything inside the marching ants be untouched by the paint brush?

[NotMyFault]

2 hours ago, Lostboysforever said:

when I look at the mask there are selections inside my selection that are not masked, shouldn't everything inside the marching ants be untouched by the paint brush?

Hi,

unfortunately, no. This depends on your settings while creating the selection, and if you used "refine mask".

https://affinity.help/photoipad/English.lproj/pages/Tools/tools_selectionBrush.html

Soft edges—if this option is off (default), edge pixels are fully opaque, which may result in a ragged appearance. When selected, edge pixels are anti-aliased for a softer appearance better suited to compositing against a new background.

Please ensure that "soft edges" is off, and do not use "refine mask" - as this by default increases the softness you do not want in your case.

[Alfred]

2 hours ago, Lostboysforever said:

shouldn't everything inside the marching ants be untouched by the paint brush?

The marching ants indicate the area within which everything is at least 50% selected. If the selection has soft edges, there will be pixels just inside the ‘marching ants’ boundary that are 51% selected and others just outside the boundary that are 49% selected (and therefore very little visual difference between the two).