Merge PrusaSlicer geometry handling for Arrange feature #2037

New Issue

MrUnknownDE · 2026-04-05T22:45:17+02:00

MrUnknownDE commented

2026-04-05 22:45:17 +02:00

Originally created by @Gareth42 on 9/30/2025

Is there an existing issue for this feature request?

I have searched the existing issues

Orca Slicer does not do a very good job of auto-arranging objects on the build plate. In particular, with objects that have area "inside" them, Orca Slicer spaces the parts out much further than necessary. This leads to cases where parts get split onto multiple build plates even though all parts can be manually arranged to fit on one plate. Example below with spacing set to 6 and auto rotation enabled.

Which printers will be beneficial to this feature?

All

Describe the solution you'd like

PrusaSlicer's algorithm for arranging objects on the build plate is superior to Orca Slicer's. Given the same set of parts, and same spacing of 6mm, PrusaSlicer arranges the objects as shown:

All objects fit on the same bed with room to spare. Given OrcaSlicer is a fork of Bambu which itself is a fork of PrusaSlicer, I don't think it would be too hard to implement PrusaSlicer's arrange algorithm. The feature to place objects "inside" of other objects has been in PrusaSlicer since 2.6.1-rc1 (Aug 2023).

Describe alternatives you've considered

No response

Additional context

No response

*Originally created by @Gareth42 on 9/30/2025* ### Is there an existing issue for this feature request? - [x] I have searched the existing issues ### Is your feature request related to a problem? Orca Slicer does not do a very good job of auto-arranging objects on the build plate. In particular, with objects that have area "inside" them, Orca Slicer spaces the parts out much further than necessary. This leads to cases where parts get split onto multiple build plates even though all parts can be manually arranged to fit on one plate. Example below with spacing set to 6 and auto rotation enabled. <img width="2576" height="1259" alt="Image" src="https://github.com/user-attachments/assets/eb73fb41-ca8f-4e41-8ff2-bda64867c015" /> ### Which printers will be beneficial to this feature? All ### Describe the solution you'd like PrusaSlicer's algorithm for arranging objects on the build plate is superior to Orca Slicer's. Given the same set of parts, and same spacing of 6mm, PrusaSlicer arranges the objects as shown: <img width="1591" height="1635" alt="Image" src="https://github.com/user-attachments/assets/a3d91a36-fc69-4cdc-a858-49d61f0589ce" /> All objects fit on the same bed with room to spare. Given OrcaSlicer is a fork of Bambu which itself is a fork of PrusaSlicer, I don't think it would be too hard to implement PrusaSlicer's arrange algorithm. The feature to place objects "inside" of other objects has been in PrusaSlicer since [2.6.1-rc1 ](https://github.com/prusa3d/PrusaSlicer/releases/tag/version_2.6.1-rc1) (Aug 2023). ### Describe alternatives you've considered _No response_ ### Additional context _No response_

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Reference: github/OrcaSlicer#2037