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prusa3d / PrusaSlicer

G-code generator for 3D printers (RepRap, Makerbot, Ultimaker etc.)
https://www.prusa3d.com/prusaslicer/
GNU Affero General Public License v3.0
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Negative modifier - problem with supports #11336

Open TheElesty opened 1 year ago

TheElesty commented 1 year ago

Description of the bug

When you remove part of model with negative modifier, it generates supports under that cuted part. Second image crops bottom 50~ layers for better visibility.

This model is not my , try of remixing it to has rubber grips and easy way was to cut that part and then use it as neg. mod on original model. To cut i used meshmixer, but it should not be relevant for this problem. Miyoo Mini Plus Grip by JohnyBoy2187 on Thingiverse: https://www.thingiverse.com/thing:6061286

Project file & How to reproduce

image image

Grip_remix.zip

Checklist of files included above

Version of PrusaSlicer

2.6.1

Operating system

Win10 64bit

Printer model

MK3s+

TheElesty commented 1 year ago

I resliced it with organic supports and they behave weardly too

FidelCapo commented 1 year ago

The problem is probably due to the fact that the Negative Volume intersects the model very closely. If the Negative Volume exceeds the model by at least a little bit, the supports are generated correctly. The same problem occurs when trying to export STL in a boolean operation..