3D print Z reinforcement via injected loops
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…
3D print Z reinforcement via injected loops launched on June 9, 2026 with 66 votes, #600 of 22,647 launches that month and more than 95% of that year's launches.
In plain words
MAGMA is a 3D printer slicing software that addresses weak layer bonding in FDM printing. Based on OrcaSlicer, it creates U-shaped vertical channels in prints and injects molten plastic into those channels to strengthen Z-axis layer interfaces. The software works with any FDM printer and includes 40+ settings for customization. It is designed for 3D printing enthusiasts willing to experiment with hardware configurations and material parameters to improve print durability along the vertical axis.
written from the facts on this page · September 2026
From the sources
Vertical reinforcement infill for FDM 3D printing
Inject molten plastic into your prints to knit the layers together. Magma is a fork of OrcaSlicer . It adds new infill types (Triangle, Rectilinear, Tri-hex, and Honeycomb cells) that build sealed vertical U-shaped channels inside your part, then injects plastic into them mid-print using the printer’s nozzle. The goal is to fix FDM Z layer weakness by truly printing in 3D. The nozzle drops into a channel, extrudes a column of plastic, lifts, and moves to the next. Every red column is one injection. Status: It works in the slicer and it prints. TUNING.md has a known-good recipe, measured on a 0.6 mm E3D V6 with PLA. Still open: how far that generalises, and whether the reinforcement is worth…from mgunlogson.github.io
In the maker’s words, at launch
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…
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