OrcaSlicer 2.3.2 Beta: Per-Feature Flow Control, Ironing Fixes, and Happy Hare Sync

OrcaSlicer 2.3.2 Beta dropped on 14 February 2026, and it is one of the more substantive slicer updates in a while. Not a feature dump — there are real, practical improvements here that affect day-to-day printing. Here is what is actually in it, and what you need to know before upgrading.

The headliner: per-feature flow rate control

This has been a long-standing request. In 2.3.2 Beta, you can now set independent flow rates for different parts of your print: first layer, outer walls, inner walls, overhangs, infill, gap fill, supports, and support interfaces — all separate from each other.

In practice, this solves a real problem. When you are printing at very thin layer heights, the outer wall sometimes shows a wrinkle effect caused by slight over-extrusion. Previously the workaround was to adjust temperature across the whole print, which affected everything. Now you can dial down the outer wall flow rate independently without touching the rest. It is the kind of granular control that was already available in some commercial slicers but not in OrcaSlicer until now.

Ironing finally works properly

Ironing in OrcaSlicer has had a nagging visual artefact — tiger-striping on top surfaces, where alternating light and dark lines appear across the ironed face. The cause is that the ironing direction rotates slightly between layers.

The fix is a new Fixed Ironing Angle option that locks the ironing direction the same on every layer. Enable it, and the tiger-striping disappears. The angle setting itself has also been changed from an absolute value to a relative offset from the top surface fill direction, which is far more intuitive — it no longer matters how infill rotation is configured.

Brim and Elephant Foot Compensation now work together

There has been a subtle but annoying bug: when Elephant Foot Compensation (EFC) is enabled and significantly reshapes the first layer, the brim could end up not actually touching the print. The brim would be generated based on the pre-EFC outline, leaving a small gap between brim and part.

2.3.2 Beta adds an option to generate the brim based on the EFC-adjusted outline instead. It is disabled by default to avoid changing behaviour on existing profiles, but if you run EFC aggressively you should turn it on.

Bridge quality improvements

Bridge density can now exceed 100%, allowing tighter line spacing. The idea is you use higher density with lower flow to get tighter, better-bonded bridges with less sagging. There is a meaningful before/after difference on wide bridges with this setting dialled in.

Happy Hare filament sync (Beta 2)

OrcaSlicer Beta 2 (15 February) added Happy Hare filament sync support via Moonraker. If you run a Klipper-based printer with Happy Hare multi-material, OrcaSlicer can now automatically read the currently loaded filament type and colour directly from your printer. No more manually updating the slicer to match what is physically loaded.

This is part of a broader modular printer agent architecture that the team has been building — the intent is to make third-party AMS-style systems first-class citizens in OrcaSlicer rather than an afterthought. Happy Hare is the first integration.

G-code viewer overhaul

The G-code viewer has been completely rewritten. Performance is significantly better on complex prints, and the visualisation itself is cleaner. This is one of those improvements you notice on the first use — navigating large G-code files is no longer sluggish.

New Bambu Lab printer support

2.3.2 Beta adds support for new Bambu Lab printer models (not specified in the release notes beyond the headline, but Beta 2 fixed a bug where the new printers were missing from the selection dialog). If you have a recently released Bambu machine and it was not appearing correctly, Beta 2 should sort it.

What to watch out for before upgrading

This is a beta, and there are a few things worth knowing:

• Custom printer and filament profiles may be hidden. Several users on Reddit reported that profiles disappeared after upgrading — particularly filament profiles imported from PrusaSlicer or profiles with custom inheritance. The workaround is to add "compatible_printers": [] to the affected filament JSON file in your config directory, or re-set the filament to inherit from a generic base profile.
• Downgrading to 2.3.1 is not clean. The config format has changed enough that going back to 2.3.1 after using 2.3.2 Beta may cause issues. Back up your config folder before upgrading if you rely on a stable daily driver.
• Shrinkage compensation range is capped. A minority issue but worth flagging — the shrinkage compensation setting has been limited to a fixed range, which affects users printing with high-shrinkage materials like certain clays. Standard FDM materials are unaffected.
• macOS: use the re-uploaded build. The initial macOS release had a startup crash. A fixed version was re-uploaded shortly after — if you downloaded it on day one, download again.

Should you upgrade?

If you run a Klipper machine with Happy Hare, or you have been frustrated by ironing tiger-stripes, or you want granular flow control — yes, 2.3.2 Beta is worth trying. Just keep your 2.3.1 config backed up first.

If you are on a Bambu printer and Bambu Studio does what you need, there is probably no urgent reason to switch to a beta. Wait for stable.

The stable 2.3.2 release is presumably coming in the next few weeks. The beta has been well-received overall — the ironing fix in particular is getting a lot of positive responses from the community. It has been a gripe for a long time.

Download OrcaSlicer 2.3.2 Beta at github.com/OrcaSlicer/OrcaSlicer/releases.