How to add a logo to a GLB file

What you need

A .glb file and a logo as a PNG with a transparent background. That is it — no 3D software, and no preparation of the model. If you have a .gltf with separate texture files, either works; GLB is just the packed version of the same format.

The steps

1. 1Open the GLBDrag the .glb into the studio. It loads in the browser — nothing is installed, and the file does not need converting first. If it came from CAD, expect unnamed parts; that is normal and does not stop anything.
2. 2Pick the surface, not the modelClick the actual panel you want branded — the door, the lid, the side. Branding is attached to that part, so picking the right one decides whether the logo behaves when the model is turned or animated.
3. 3Place the logoUpload a PNG with a transparent background and click where it should sit. A logo with a white box around it will show that box; transparency is the difference between a decal and a sticker.
4. 4Size it against the product, not the screenZoom out to the whole model before judging the size. A logo sized while zoomed into a panel is almost always too big — the most common single mistake.
5. 5Check it from the angles you will actually showOrbit around. A logo that looks right head-on can cross a panel gap or foreshorten badly from three-quarters, which is the angle most product shots use.
6. 6ExportRender a PNG for decks and sign-off, or export a branded model file for anyone who needs the asset. Check the render against what you saw on screen before sending it on.

Where it usually goes wrong

The logo has a white background. A JPEG cannot be transparent. Exported as a PNG without an alpha channel, it will not be either. If your logo appears in a white rectangle, this is why, and no setting in any tool will fix the file.

It is enormous. Models arrive at wildly different scales — some are measured in metres, some in centimetres. Judge the size zoomed out, against the whole product.

It landed on the wrong part. Many CAD exports name every part something like polySurface149, and some name several parts the same thing. Click the geometry itself rather than picking from a list of names you cannot tell apart.

If the logo looks stretched rather than misplaced, that is a different problem with a different cause — see why your decal looks stretched.