Smoothly from digital model to print-ready part
With version 3.54 of PreForm, Formlabs introduces new features that make 3D printing with SLA and SLS even easier, more reliable, and more efficient—from more precise support to automatic packing to practical CAD import and measurement tools.
17 Dec 2025Share
According to the provider, the free 3D preparation software PreForm from Formlabs has taken a big step forward with the release of version 3.54. For users of Formlabs SLA and SLS printers, this means significantly less time spent on print preparation and noticeably improved print quality.
A key feature is the new Supports V2 support algorithm. Compared to its predecessor, it generates contact points that are 50 percent smaller on average — and these are placed specifically at edges and corners instead of on flat surfaces. The result: smoother surfaces, cleaner edges, and less post-processing effort. In addition, Supports V2 improves dimensional accuracy: according to the manufacturer, the deviation in challenging models has been halved on average.
In addition to support, PreForm 3.54 comes with several new tools and workflow optimizations. Among these, the integrated measuring tools are particularly important: they allow distances and dimensions to be measured precisely directly within the 3D model — very useful for checking fits, clearly defined distances, or wall thicknesses. Importing CAD assemblies has also become more convenient: PreForm now automatically recognizes when an assembly is imported and offers to load it either as a whole or as individual components. This saves time while maintaining control over alignment and packing.
A brand new feature is called Fill the Build—an automatic packing tool that optimally distributes parts on the build platform, maximizing utilization and efficiency. For users of the SLS Fuse series in particular, this can reduce material consumption and lower the cost per part. In addition, numerous usability improvements — “quality-of-life” features — have been implemented: better navigation and viewing options, color coding for part lists, clearer display of complex assemblies or packing volumes. This makes print preparation much more intuitive and less prone to errors.
Overall, according to Formlabs, PreForm 3.54 reinforces its claim to make the transition from digital model to print-ready part as smooth as possible. For beginners as well as experienced 3D printers. According to its developers, the new version simplifies workflows, reduces manual effort, and noticeably improves the quality of many applications.
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