3D Models for Simplify3D

Simplify3D version 5 supports STL (binary and ASCII), 3MF, OBJ, and AMF file formats. STL is the most universally used format for 3D printing and the safest choice for Simplify3D compatibility. 3MF is a richer format that preserves color, material, and unit data — useful for multi-material or color printing workflows. OBJ imports geometry but material properties are not used by the slicer. For Proofly models: STL is available on almost all printable listings; 3MF is available on select listings; download STL unless the listing specifically offers a 3MF with pre-configured materials.

For clean slicing in Simplify3D, 3D models should be watertight (manifold) — every edge shared by exactly two faces with no holes, open edges, or non-manifold vertices. Simplify3D has a mesh repair function (Repair Model) that can fix minor issues, but severely broken geometry can still cause slicing errors. Additional requirements: wall thickness should be at least 1.2mm for FDM (2× your nozzle diameter) or 0.5mm for resin DLP/MSLA; overhangs steeper than 45° typically need supports in Simplify3D; flat bottom faces slice better without supports. Proofly's in-browser 3D viewer runs a manifold check on STL files — look for the 'Watertight' badge on listings to identify pre-verified meshes.

To slice a Proofly STL in Simplify3D: 1) Download the STL file from Proofly after purchase. 2) Open Simplify3D → Import Model (or drag the .stl file onto the build plate). 3) Position and scale the model using Simplify3D's manipulation tools — right-click for Center, Place on Surface, and Scale. 4) Click Edit Process Settings to configure layer height, infill, supports, temperature, and print speed for your printer profile. 5) Click Prepare to Print → Begin Slicing. 6) Review the sliced preview for layer artifacts, then Start Print or save the G-code. For models that need supports, Simplify3D's automatic support generation with customizable support density and overhang angle threshold is one of its strongest features compared to free slicers.

Recommended Simplify3D settings vary by model type. For miniatures and figurines (resin DLP/MSLA): layer height 0.025–0.05mm, anti-aliasing on, bottom layers 6–8, exposure time per your resin spec. For functional FDM parts: layer height 0.2mm, infill 40–60%, 3–4 perimeters for wall strength, supports 30% density. For cosplay props (large FDM): layer height 0.3mm for speed, 2–3 perimeters, 15–20% gyroid infill, may need print-in-place orientation to minimize seams. For architectural models: layer height 0.15–0.2mm, 15–20% infill, seam placement at least visible face. Simplify3D's per-process layer override is its killer feature — use it to print the base at 0.3mm and switch to 0.15mm for detail areas without re-slicing.

It depends on the license tier. Proofly's standard Commercial license covers using the STL file in a commercial product — including printing and selling physical copies of the model. Check each listing's license terms: Personal license = personal prints only, no sales; Commercial license = print and sell physical items commercially; Extended license = sell the STL file itself or use in a sold digital product. For Proofly sellers: if you plan to sell physical prints on Etsy, at conventions, or to clients, verify the listing's license tier supports commercial physical use before purchasing. Most Proofly listings have Commercial licenses available.