Interlaced Topologically Interlocking Lattice for continuous dual-material extrusion  

That's the way to do it but I wouldn't trust the job to the slicer.  Like supports the structure created by slicer defaults is a fallback for when you must download someone else's design and they have not incorporated custom structures.  Ideally you will create a tailored interlock at the design stage.

You may like to review these threads:

https://forum.prusa3d.com/forum/prusaslicer/manual-multicolor/

https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-how-do-i-print-this-printing-help/acting-as-my-own-mmu

Cheerio,

RE: Interlaced Topologically Interlocking Lattice for continuous dual-material extrusion

I'm re-opening this thread because I think this is a somewhat necessary feature for the multi-head XL.  Sure, you can design everything in the model, but this makes the geometry really tricky.  I was trying to do such an interface in Solidworks and it will break a lot of your mates, change geometry, etc.  Ideally it should be determined by the layer size, nozzle, etc.  You might not know these parameters in the design phase.  I feel like doing this in the slicer is ideal.

RE: Interlaced Topologically Interlocking Lattice for continuous dual-material extrusion

Incase someone from the future finds this thread - PrusaSlicer 2.9.1-alpha1 has inclued a port of the capability from cura - https://github.com/prusa3d/PrusaSlicer/issues/11588

https://github.com/prusa3d/PrusaSlicer/releases/tag/version_2.9.1-alpha1

The option can be turned on in Print Settings -> Multiple Extruders -> Advanced, where one also finds a couple of related parameters.

The feature was originally developed in Ultimaker Cura and it was later ported into OrcaSlicer. The implementation in PrusaSlicer was ported from there, with only minor modifications. We would like to express our gratitude to everyone involved in the development of this feature.