3D Models for Cura

Ultimaker Cura supports STL, 3MF, OBJ, X3D, and AMF formats. STL is the most common and compatible — virtually every model marketplace exports STL. 3MF is the modern successor: it carries print settings, multi-part data, and material information in a single file and is fully supported in Cura 5+. OBJ is supported for models with materials but is less common in the 3D printing workflow. Cura does NOT support FBX, GLB, or BLEND natively without conversion.

Drag and drop the STL file directly onto the Cura build plate, or go to File → Open File(s) and select your STL. Cura automatically centers and orients the model on the build plate. You can then select it and use the tools on the left panel (Move, Scale, Rotate, Mirror, Per-Model Settings) before slicing. If the model has errors (non-manifold edges, holes), Cura has a built-in mesh fixer that handles most common issues automatically. For complex repairs, use Meshmixer or Netfabb before importing.

A print-ready model for Cura has: (1) Watertight (manifold) geometry — no holes or non-manifold edges that confuse the slicer. (2) Correct scale — designed in real-world units (mm), not scaled arbitrarily. (3) Proper wall thickness — minimum 1.2mm for standard 0.4mm nozzles, or 0.8mm for walls that benefit from single-perimeter printing. (4) Flat base where possible — models with a flat bottom don't need a brim or raft. (5) Minimal overhangs — surfaces beyond 45-50° overhang angle may need support material. High-quality Proofly models include notes on print orientation, layer height, infill, and support requirements.

STL stores only triangle mesh geometry — no color, no print settings, no material data. It's the universal format: every slicer reads it. 3MF (3D Manufacturing Format) is a modern XML-based format that stores geometry, color/material assignments, print settings, part transformations, and multi-model arrangements in a single file. Cura 5+ supports 3MF for both import and export. If a creator exports a 3MF from Cura or PrusaSlicer with pre-configured print settings, importing that 3MF into Cura restores those settings automatically — which reduces setup time for complex prints. For simple single-material models, STL is fine and more universally compatible.

Yes. Proofly has a free tier of models — use the Free filter in the marketplace to find zero-cost STL downloads. Free models still receive HiddenMark steganographic watermarking on each download, so creators can offer files freely while retaining piracy tracing. For functional prints (phone stands, cable clips, brackets), also browse the free section in Gadgets and Accessories categories. Paid models on Proofly start from under $3 and come with a permanent commercial license — no subscription required.

Cura primarily targets FDM (Fused Deposition Modeling) printers — Ultimaker, Creality, Bambu, Prusa, Ender series, and thousands of community profiles. It's not designed for SLA or MSLA resin printing (use Chitubox or Lychee Slicer for resin). Most Proofly models are designed and tested for FDM. Some models — especially miniatures and detailed figurines — are designed for resin. Check the model's tags and description: 'FDM-ready', 'resin', 'support-free', or 'pre-supported' are common indicators.