Organizing 3D files on a Mac: models, textures and renders

3D work scatters files: an .stl downloaded for printing, a .glb from a marketplace, .blend saves, .usdz previews for AR, texture PNGs, render MP4s. Sorting by type usually drops them in a folder called “Other”. DeclutrDeclutr has a 3D Models category built in: one click sorts every model out of Downloads or the Desktop, textures go to Images, renders to Videos, and one Undo puts everything back.

A project structure for 3D

Project name/
  models/      .blend .fbx .obj
  textures/    .png .jpg .exr
  renders/     .png .mp4
  exports/     .glb .usdz .stl

Keep downloaded assets apart, in an Assets library folder sorted by source or kind, so a project folder only holds what it uses.

Formats Declutr puts in 3D Models

.blend .ma .mb .obj .fbx .dae .3ds .max .c4d .skp .stl .ply .x3d .gltf .glb .usd .usda .usdz .3mf .f3d .step

Blender, Maya, 3ds Max, Cinema 4D, SketchUp, Fusion, printing formats (.stl, .3mf) and Apple’s .usdz are all covered. With Pro, add more, such as .abc or .ztl, in Declutr’s File types settings.

Preview without opening an app

Select a .usdz in Finder and press Space: Quick Look shows the model in 3D, and recent macOS versions do the same for many .obj and .stl files. It’s the fastest way to decide what to keep before sorting.

Rules for 3D work (Pro)

• Extension is stl OR 3mf → To print.
• Name contains texture OR name contains _albedo → Textures.
• Extension is blend1 → Blender backups (Blender’s automatic backup saves).
• Larger than 500 MB AND older than 60 days → Archive.

The sort is free. Pro is a one-time $8.99 in the US: Smart Rules, custom categories, watched folders, daily cleanup. It moves files and never deletes them. macOS 13 Ventura or later.

Related: how to organize files on a Mac and how to free up disk space.

Questions people ask

How do I organize 3D model files on a Mac?

Keep one folder per project with subfolders for models, textures, renders and exports, and give downloaded models a folder of their own. Declutr sorts loose 3D files from Downloads or the Desktop into a 3D Models folder in one click.

Which 3D formats does Declutr recognize?

Its 3D Models category covers .blend, .ma, .mb, .obj, .fbx, .dae, .3ds, .max, .c4d, .skp, .stl, .ply, .x3d, .gltf, .glb, .usd, .usda, .usdz, .3mf, .f3d and .step.

Can I preview 3D files on a Mac without an app?

Yes, for some formats. Select a .usdz file in Finder and press Space: Quick Look shows the model and lets you rotate it. Recent macOS versions also preview some .obj and .stl files the same way.