POC: external perimeter cut corners #1587

New Issue

MrUnknownDE · 2026-04-05T18:32:00+02:00

MrUnknownDE commented

2026-04-05 18:32:00 +02:00

Originally created by @ianalexis on 11/18/2025

Theory

https://github.com/slic3r/Slic3r/issues/5182
Unlike Pressure Advance, which compensates for pressure inside the nozzle and filament pushed by the extruder, this mechanism compensates for the buildup of material at acute corners (the sharper the angle, the more the material overlaps).
In theory, this ensures that when tuning PA, corners don’t become bulkier due to non-pressure-related factors, resulting in a more consistent balance between corner compensation and a clean seam.

Proof of concept

Based in:

Added 'external_perimeter_cut_corners' option to adapt flow near sharp outer corners, reducing over-extrusion

Closes #11254

TO DO

Wiki
Internal Round Corners

*Originally created by @ianalexis on 11/18/2025* # Theory https://github.com/slic3r/Slic3r/issues/5182 Unlike Pressure Advance, which compensates for pressure inside the nozzle and filament pushed by the extruder, this mechanism compensates for the buildup of material at acute corners (the sharper the angle, the more the material overlaps). In theory, this ensures that when tuning PA, corners don’t become bulkier due to non-pressure-related factors, resulting in a more consistent balance between corner compensation and a clean seam. <img width="324" height="297" alt="293516742-0023769c-d610-4757-9e76-c183a8800f68" src="https://github.com/user-attachments/assets/9b2aa422-6c26-418b-be5c-1de4ea015a13" /> <img width="341" height="352" alt="293516757-5561977f-5199-43af-b6c2-92f41c3de90a" src="https://github.com/user-attachments/assets/9debf9e6-bfec-4929-be02-f87136772346" /> # Proof of concept Based in: - https://github.com/slic3r/Slic3r/issues/5182 - https://github.com/supermerill/SuperSlicer/commit/90b129e585 - https://github.com/supermerill/SuperSlicer/commit/80ce4bf612 - https://github.com/supermerill/SuperSlicer/commit/282db5bd4f Added 'external_perimeter_cut_corners' option to adapt flow near sharp outer corners, reducing over-extrusion <img width="568" height="255" alt="imagen" src="https://github.com/user-attachments/assets/0df95421-d5ed-4cdd-8924-7f2a15c8da86" /> Closes #11254 # TO DO - [ ] Wiki - [ ] Internal Round Corners

MrUnknownDE closed this issue

2026-04-05 18:32:00 +02:00

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Reference: github/OrcaSlicer#1587