slicer err for sl1 printer

[xingshh]

Description of the bug

slicer error for model with cavity that has indepented mesh .
ball.zip

Project file & How to reproduce

1, select sl1 printer
2, add model
3, slice

Checklist of files included above

• Project file
• Screenshot

Version of PrusaSlicer

2.8.1

Operating system

window10

Printer model

prusla sl1

[xingshh]

[Jan-Soustruznik]

Hello, @xingshh , thank for you feedback. I created internal issue: SPE-2630

[Jony01]

I confirm, that issue with inner shell is reproducible and will be fixed in future.
At this moment, as a way around, you could split your model To parts.

And select inner shell as negative volume.


And you will achiev your desired model

Do not forget to add drain holes to not print closed reservoar of the resin.

[xingshh]

@Jony01
i read the code in file SLAPrintSteps.cpp, in function
void SLAPrint::Steps::mesh_assembly(SLAPrintObject &po)
{
po.m_mesh_to_slice.clear();
po.m_supportdata.reset();
po.m_hollowing_data.reset();

csg::model_to_csgmesh(*po.model_object(), po.trafo(),
                      csg_inserter{po.m_mesh_to_slice, slaposAssembly},
                      csg::mpartsPositive | csg::mpartsNegative | csg::mpartsDoSplits);

generate_preview(po, slaposAssembly);

}
it is caused by flag csg::mpartsDoSplits. Can this flag be removed？

[Jony01]

It is not my code. So, I barely see impact of the change.

By commit it was added to support for csg operation stacking by @tamasmeszaros

@tamasmeszaros : Could you pointing us what will not work after removing the flag?

I gave it a try and It seems that this would probably fix multi shell model input stl file usage.

[lukasmatena]

Should be fixed in PrusaSlicer 2.9.1-alpha1. Closing.