Modern Stack

The 3D printing software ecosystem has been building on the same foundation for over a decade. At some point you have to modernize the base or you're just stacking features on top of technical debt. We decided to rip off the bandaid.

True 64-bit Architecture

Every other major slicer uses 32-bit coordinate types internally. preFlight moved to native 64-bit throughout, eliminating overflow bugs on large prints and matching Clipper2's native types. Clipper2 is compiled with 10-decimal precision, far exceeding the standard used by other slicers built on the same geometry library.

Modernized Dependencies

C++20, Clipper2, Boost 1.90, CGAL 6.1, OpenCASCADE 7.9, Eigen 5.0. We replaced GMP/MPFR, killed GLEW in favor of GLAD, and fixed memory leaks that accumulated gigabytes over long sessions. The Clipper1 to Clipper2 migration alone took weeks and touched every polygon operation in the codebase. There's a reason no other fork has attempted it.

Built Upstream, Not Bolted On

It would have been easier to slap on features in post-processing, which is how others tend to do it. We took a different approach and modernized at the source. Our features are built upstream, not bolted on in post. Not glamorous work, but it's what makes everything else possible.

In-Memory Processing

preFlight processes everything in memory with no temporary files. This results in at least 50% less RAM usage compared to legacy slicers while maintaining full processing fidelity. Fewer disk writes also means faster slicing and no leftover temp files cluttering your system.