3D workflow guides

• Retopology in 2026: When You Need It, When You Do Not, and What AI Can Actually Do 2026-08-25

  Retopology is recommended far more often than it is required. What each destination actually demands, the order that keeps auto-retopology from failing, and which AI tools have shipped.

• OBJ vs STL: What Each Format Stores, and Why One Direction Costs More 2026-08-23

  STL does not share vertices and OBJ does, which decides file size, what survives conversion, and why an STL converted to OBJ arrives shattered. With measured figures.

• Non-Manifold Edges: Why Sealing Every Hole Does Not Clear the Error 2026-08-20

  Non-manifold and not watertight are different properties, so a sealed model can still throw the error. What the number counts, when you can print anyway, and the exact fix in each tool.

• How to Convert STL to STEP: The Route Depends on Where the STL Came From 2026-08-17

  A mesh from CAD and a mesh from a scan need opposite algorithms, and using the wrong one fails predictably. Exact menu paths for FreeCAD, Fusion 360 and SolidWorks, plus which methods are paywalled.

• FBX vs OBJ: What Survives the Conversion and What Silently Does Not 2026-08-14

  FBX carries rigs and animation that OBJ cannot. On PBR materials the ranking flips, and the reason is built into the FBX SDK. What each format stores, and how to convert without losing textures.

• STEP vs STL: Converting Both Ways, and Why One Direction Barely Works 2026-08-11

  STEP to STL is routine. STL to STEP is not a conversion at all, it is a rebuild. Here is what each format stores, what the converters actually output, and the tool limits nobody mentions.

• What Is a GLB File? How to Open One, Look Inside It, and Convert It 2026-08-07

  A GLB is a whole 3D scene in one binary file: geometry, materials and textures together. Here is how to open one without installing anything, what is actually inside, and when to convert it.

• 3MF vs STL: What Changes When You Switch, and What Nobody Warns You About 2026-08-04

  3MF carries units, colour, objects and print settings that STL cannot. It also overwrites your slicer profile, breaks between vendors, and has a real security history. All four, with sources.

• How to Repair a Broken STL File: Holes, Non-Manifold Edges and Flipped Normals 2026-07-16

  A practical guide to fixing STL errors that break 3D prints, from one-click auto-repair to MeshLab, plus why AI generated meshes need it most.