Seamless Texture Maker

A seamless texture repeats without visible joins, so it can cover a 3D model, a game level or a web page background of any size. Most photos do not tile: the left edge does not continue into the right one. This maker fixes that by fading the opposite half of the image into each edge, or by mirroring the image into a symmetric 2 × 2 tile, and shows a 3 × 3 preview so you can spot seams and repeating features. It works in your browser.

How to use this tool

1. Choose a texture photo — evenly lit surfaces such as grass, stone, wood or fabric work best.
2. Pick edge blending (keeps the size) or mirroring (always seamless, 2× larger).
3. For blending, set how wide the faded band at each edge is.
4. Check the 3 × 3 preview, then download the tile. Use offset mode to inspect the seams.

Formula

T(x) = α(x) × I(x) + (1 − α(x)) × I(x + W/2), with α = smoothstep(distance to the nearest edge ÷ band); the same is then applied vertically

I is the image, W its width and the band is the blend width × W. At the very edge α is 0, so the tile shows the shifted copy, whose left and right edges are neighbouring pixels from the middle of the image — that is what makes it tile. From the band inwards α is 1 and the original is untouched. The vertical pass works on the result of the horizontal one, so both directions tile. Mirroring places the image and its horizontal, vertical and double flips in a 2 × 2 grid.

Example

For a 1024 × 1024 texture with a 25% band, the outer 256 px on each side are blended and the central 512 × 512 px stay exactly as they were. Column 0 then shows mostly column 512 of the original, and column 1023 mostly column 511 — neighbours, so there is no seam when the tile repeats.