Why your logo has a white box on a clothing mockup

First, check what is actually in the file

Open the source artwork in an editor that displays transparency as a checkerboard. The empty area around the logo should reveal that checkerboard, not a flat white canvas. Try placing a temporary dark layer behind the design to expose leftover pale pixels.

A checkerboard can also be baked into an image downloaded from a preview page. If the squares stay visible when you put a solid color behind the artwork, they are part of the picture. Obtain the original transparent file rather than using a screenshot of the preview.

Export without the background layer

Hide or remove the unwanted background in your artwork editor, then export a PNG with transparency enabled. Standard JPEG files do not preserve a transparent background. Converting a JPEG to PNG keeps its white pixels unless you remove them first.

Keep intentional white details inside the design. Removing every white pixel can punch holes through lettering, highlights, or illustration details. Background removal should target the surrounding canvas, not erase a color indiscriminately.

1. Turn off the background layer before export.
2. Preserve intentional white lettering and illustration details.
3. Reopen the exported file and check it on a dark background.
4. Import the corrected file as a new image layer in your mockup.

Fix white halos around the edges

If the box is gone but a pale outline remains, inspect the edge pixels at higher zoom. Artwork cut out from a white background can retain light pixels along curved edges. These become obvious on a black hoodie even when they looked fine on a white canvas.

Refine the cutout in the original artwork tool, or export again from the source vector if you have it. Do not keep shrinking and re-enlarging the same low-resolution copy. Each version should come from the cleanest source available.

Separate transparency problems from sharpness problems

Transparency controls whether the background is visible. Pixel dimensions control how much image detail you have. A transparent graphic can still look blurry when enlarged beyond the detail in the original file.

For a mockup, judge the exported image at its intended viewing size. For printing, follow the specific printer's required dimensions, resolution, and color profile. A DPI label alone does not create additional pixels, and a sharp mockup export does not turn small source artwork into a production file.

Check at least two garment colors

Before calling the file finished, put it on both a light and a dark garment in 3D Mockup. Inspect the main outline, any fine text, and areas intended to be empty. This quick comparison often reveals issues that were invisible in the source editor.

Save the corrected artwork separately from the mockup. That gives you a reusable source for a T-shirt, hoodie, or future colorway instead of a finished image with a garment permanently baked into it.