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Outer walls inside merged model

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Posted · Outer walls inside merged model

I have a simple two part test cube from Printables (Twisted Dual Color XYZ Calibration Cube) that I'm trying to print on a Snapmaker J1. After assigning an extruder to each piece and merging everything looks good. But the slice preview shows Cura is still treating the interior walls of each separate piece as outer walls despite them actually being inside the model. Since I have outer walls set to print slower it's adding a lot of extra time. Should the merge feature eliminate these outer walls inside the model, or is there a setting I can utilize to help this? Using 5.3.1.



Screenshot from 2023-05-26 11-08-19.png

Screenshot from 2023-05-26 11-07-48.png

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    Posted · Outer walls inside merged model

    There are a couple of bug reports about this on GitHub.   Whether "Union Over-Lapping volumes" is turned on or off - they don't union but simply stay separate resulting in what you have there..


    Union Over-Lapping Volumes = Off



    Union Over-Lapping Volumes = ON with Remove Mesh Intersection off



    Union Over-Lapping Volumes = ON with Remove Mesh Intersection on.

    This looks like one block is acting as a cutting mesh.  There are still interior walls where I would have expected none.


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