SIB to PLY Converter
FileFlip converts SIB to PLY entirely inside your browser, using Assimp compiled to WebAssembly. The file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. That means no file-size limit, no queue and no account.
How do I convert a SIB file to PLY?#
- Drop your SIB file onto the converter at the top of this page, or click it to pick one from your computer. You can add as many as you like.
- Leave the target set to PLY and the conversion starts on its own. FileFlip downloads 11.2 MB of WebAssembly the first time and nothing after that, then runs Assimp on your own machine.
- Save the PLY file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting SIB to PLY lose quality?#
Not in the sense of pixels or samples. Converting SIB to PLY rebuilds the file in PLY's own model rather than re-encoding it, so everything PLY can represent comes through exactly and anything it cannot has to be dropped. Expect the geometry to be exact, and anything the target has no place for, such as a rig, to be left behind.
Is it safe to convert SIB files online?#
Yes, because nothing is uploaded. FileFlip converts SIB files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What SIB to PLY actually does to the file#
Converting SIB to PLY runs on Assimp, downloads 11.2 MB of WebAssembly the first time and nothing after that, rebuilds the file in the target's own model, and drops skeleton and animation.
| Engine | Assimp |
|---|---|
| Conversion path | One step: SIB → PLY |
| Downloaded to your browser | 11.2 MB, once, then cached by your browser |
| Quality | Rebuilt in the target's model |
| You get back | One file |
| Where it runs | In a background worker, so the page stays responsive |
What survives the conversion
| What is in the file | This conversion | Why |
|---|---|---|
| Materials | Sometimes | Survives for some files and not others. |
| Textures | Sometimes | Survives for some files and not others. |
| Skeleton and animation | Dropped | The target format has nowhere to put it. |
Worth knowing before you start:
- if the source carries a skeleton or animation, this target has no place to store it
What is a SIB file?#
A SIB file is Silo's native scene format from Nevercenter, holding the subdivision surface mesh and modelling data built up inside Silo's polygon modeller and UV mapper.
Keep a model as SIB while it's still being sculpted or UV-mapped inside Silo, to preserve the subdivision cage.
Convert SIB to OBJ or FBX once the model needs to move into another modeller or an engine, since almost nothing else reads SIB directly.
What is a PLY file?#
A PLY file stores a point cloud or mesh as a list of elements, typically vertices and faces, each carrying whatever properties its writer chose to attach, such as colour, normals or scan confidence, which is why 3D scanners and photogrammetry tools favour it over formats with a fixed vertex layout.
Use PLY straight out of a 3D scanner or photogrammetry tool, since it's built to carry exactly the per-point data those pipelines produce.
Convert PLY to OBJ or glTF once the scan needs to go into a rendering or animation pipeline that expects UV-mapped textures instead of vertex colour.
SIB to PLY questions people ask#
What is a SIB file?
A SIB file is a Silo project, holding the subdivision surface mesh and modelling data from Nevercenter's Silo, a modeller focused on polygon and subdivision surface work with UV mapping. Silo also reads and writes a separate SIA project format alongside SIB.
Is Silo still available to open SIB files?
Yes. Unlike most applications with a format this obscure, Silo is still sold and actively updated by Nevercenter, with releases continuing well past 2020, so a current copy of Silo opens a SIB file without any special handling.
Can other 3D software open SIB files?
Not directly in most cases. Silo can export to more widely supported formats like OBJ, FBX and COLLADA, and that export is the usual way to move a Silo model into another application rather than that application reading SIB itself.
What is a PLY file used for?
A PLY file stores a point cloud or mesh, most commonly the raw output of a 3D scanner or photogrammetry tool, because it can carry arbitrary per-vertex data like colour, normals and scan confidence alongside position. It came out of Stanford's graphics lab in the mid-1990s for exactly that purpose.