Printing with PETG as support for PLA
Settings used for using PETG as a support interface is as follows in Bambu Studio (other slicers may differ):
Style: Snug
Support Base: Default
Support Interface: PETG
Top Z Distance: 0
Bottom Z Distance: 0
Top Interface Layers: 3
Bottom Interface Layers: 3
Support Object X/Y Distance: 0.5
Top Interface Spacing: 0
Base Pattern Spacing: 2