Stacking prints, setting solid layer between color changes

im having an issue where I am stacking prints.

I have two PLA+ Models stacked with a thin petg spacer between them.

issue im having is that when printing these 3 merged objects. it prints fine. except that the top and bottom layers between the colors are not solid. the infill is visible.

I am not using supports. is it possible to set it so when the color changes its a solid layer during the transition. I have all three objects merged in Bambu Slicer
GOEWS Tile 2x2 Stack with spacer.3mf (413.2 KB)

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Hello! Were you able to find a fix for this? I’m trying to solve a similar problem. When I get to the top of one object, and the next object will start (in a different color), I’d like the first to have a solid top layer and not these infill gaps. Thoughts?

yes. enable Dev mode in settings/preferences and then use this feature

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OMG, thank you @Mr.Exocomp ! Even with my terrible description, you hit the nail on the head! Thanks again!

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