Commodity FDM print strength is limited by poor Z-axis layer bonding. Parts crack along Z under stress. MAGMA tries to fix this in software that works on any FDM 3D printer.It s a fork of OrcaSlicer with a new infill type that creates paired U-shaped vertical channels inside the print, plus G-code that injects molten plastic into those channels to bridge Z layer interfaces with continuous plastic.Big caveat: I have a junky Ender 3 and haven t gotten a clean physical print yet. Don t expect this to work out of the box! After months of tinkering, I m releasing the software so the 3DP community can experiment with nozzles, multi-material, weird hardware, and other print parameters I can t. There s around 40 MAGMA-specific settings to fiddle with, plus some general quality-of-life features (e.g. printing thin infill sections as solid, and a dual infill shell feature that applies MAGMA only to the outer shell to save print time).THIS CODE IS ALPHA. Around 50 prints old. The injection G-code is novel. Some printer firmware won t like extruding without movement. In extreme cases it could damage your printer or start a fire. DON T WALK AWAY WHILE PRINTING.Why MAGMA? Lava tubes is a misnomer. Molten rock is magma underground, lava only after it surfaces. The injected tubes are buried inside the print, so magma tubes is the correct term.