PrusaSlicer Beta Refactors SLA Slicing, Hints at 3.0 Soon

PrusaSlicer’s first public 2.9.5 beta does not chase flashy UI changes. It rewires the SLA slicing path, and for anyone who prints resin models with dense tree supports, that is the part that matters: Prusa says the new analytical approach for SLA supports improves speed and memory use, and heavily supported models can slice more than twice as fast.

That change matters because PrusaSlicer is not just a filament slicer with a resin tab bolted on. Prusa Research, the company founded by Josef Prusa, uses it as the official tool for turning 3D models into G-code for FFF printers and PNG layers for mSLA printers. In the same software, Prusa has already been stacking real workflow features, from multiple build plates in 2.9.0 to direct access to Printables content. This beta keeps that direction going with more SLA work and additional changes aimed at the upcoming SLX printer.

The part worth testing now is the SLA pipeline itself. The old mesh-heavy support handling has been pushed aside for an analytical method, which should be easier on memory when a job is support-heavy and should remove some of the pain users have seen on larger resin projects. If you run files that normally bog down during slicing, this is the build to stress-test. If your current setup is stable and you are mid-project, there is no reason to tear it up just because a beta exists.

Prusa also made the beta safer to trial. Alpha and beta builds save profiles in separate PrusaSlicer-alpha and PrusaSlicer-beta folders, so the new build can sit beside a production install without trampling your normal configuration. That matters more than it sounds, because slicer settings are where resin users build muscle memory: support presets, exposure tweaks, plate layouts, and job-specific project settings. Linux users get another wrinkle through Flatpak, though that package can lag the GitHub release by a few hours.

What really lit up the changelog was the hint at PrusaSlicer 3.0. The wording at the end of the beta notes suggests the long-awaited major update is close, maybe a matter of weeks and maybe more than four, which is vague but not coy enough to ignore. Prusa’s downloads page still listed 2.9.4 as the latest stable release on November 7, 2025, so the 2.9.x line is still being maintained while 3.0 is being shaped into something larger, with talk of a UI overhaul, tabbed projects, and broader engine changes. For everyday users, this beta says the quiet part out loud: PrusaSlicer is moving toward a cleaner, faster workflow, and resin slicing is getting the first serious rewrite.