Orrery
0.1.0 Free and open source, for Windows
Orrery is a 3D model viewer for FBX, glTF and GLB that gets out of the way: the file opens framed, lit, measured and already playing its first animation. One small exe. No installer, no project, no network.
The live demo needs WebGL, which this browser has turned off. Orrery itself renders with hardware acceleration through WebView2.
Open a file and Orrery does the five things you would do by hand: it frames the whole model, lights it with a studio environment, counts what is inside, finds its textures and starts the first animation.
The overlay in the corner answers the usual questions about an asset you just downloaded or exported: how heavy it is, whether its textures made it, how big it is in its own units, and which clips it carries. When something is wrong, a banner says what, and the mesh is still shown.
Drag another file onto the window to switch. Hold Shift while dropping to add its animations instead.
The overlay, line by line
Captures of the actual orrery.exe window, showing the brass orrery from the demo above exported as a GLB. Nothing here is a mock-up.
FBX files remember texture paths from the machine that made them: absolute paths on someone else's drive, backslashes, .. hops, a PSD where you have a TGA. Orrery tries the reasonable places in order and stops at the first file that exists.
Embedded images in GLB and FBX.
Paths relative to the model, including backslashes and ...
The exact absolute path written in the file, if it is an image.
The same file name, or the same name with another image extension, in the model's folder tree (5 levels) and its parent's (4 levels).
Listed by name in a banner. The mesh renders anyway.
PNG, JPEG, TGA, BMP, WebP, GIF and KTX2 images are read. PSD cannot be decoded, so a TGA or PNG with the same name is used when one exists.
Bone names, the way Orrery compares them
| In the clip file | Compared as | In your model |
|---|---|---|
mixamorig:LeftArm | leftarm | LeftArm |
Armature|Left_Fore_Arm | leftforearm | left forearm |
Bip001 Spine1 | spine1 | Spine1 |
Tail_01 | tail01 | not in the model, dropped |
| righthandthumb1 | type a name to try it |
Exact names win first. Case, spaces, underscores and dots are ignored, as are namespaces like Armature| and prefixes like mixamorig or Bip001.
The first clip plays as soon as the model appears. A control bar gives you play and pause, a timeline scrubber, speed from 0.25x to 2x, looping, a clip list and lock root, which keeps a walk cycle walking on the spot.
Have the character in one file and the motions in another? Press Add animations or Shift-drop the second file. Orrery binds its tracks to your model's bones by name, rescales positions by the median bone-length ratio (FBX centimetres onto metres) and applies them relative to the rest pose. It then tells you how it went, for example matched 52/65 bones
, and warns when too few matched.
This is name binding, not a full retarget: rigs with different naming schemes do not match.
A model from the internet is a file from a stranger. Orrery treats it that way: the viewer can read the model you opened and the images and buffers it needs, nothing else, and it has no way to reach the network at all.
.bin buffers../../ escapeshttp(s), ftp, ws and every other remote URL in a model, reported as remote resource blocked
The page inside Orrery runs under a strict Content-Security-Policy ('self', data:, blob: only). The file rules are covered by unit tests in src/resolve.rs. This page follows the same idea: the demo above reads only the files you hand it, in your browser.
| The exe | 3.6 MB, three.js embedded |
|---|---|
| The download | 1.2 MB zip |
| Installer | none, unzip and run |
| Runtime | WebView2, already on Windows 10 and 11 |
Built in Rust on WebView2 with three.js r186. The window is dark from the first frame, and a loading screen with the file name covers long parses.
register.ps1 adds Orrery to the Open with list for .fbx, .glb and .gltf. It writes only under HKCU\Software\Classes, needs no admin rights, and unregister.ps1 takes it out again.
Windows does not let programs make themselves the default, so you choose it once: right-click a model, Open with, Choose another app, Orrery, Always.
Orrery , released . Windows 10 and 11, x64.
register.ps1, Run with PowerShell, to add Orrery to Open with.The exe is not code-signed yet, so SmartScreen may warn on the first start: choose More info, then Run anyway. Each release lists the SHA-256 of its zip.
Needs a Rust toolchain and the WebView2 runtime.
git clone https://github.com/rennerdo30/orrery
cd orrery
cargo build --releaseThe exe is target\release\orrery.exe. cargo test --release runs the unit tests.