Why do mosaic sheets show square outlines
Mosaic sheets show square outlines when the sheet edges are set without enough adjustment. The pieces may come on mesh, but the finished surface should not advertise the sheet size.
Renan dry-checks the layout, trims or staggers sheet edges where needed and adjusts individual pieces before the mortar firms up. That is especially important on shower tile, where the slope and drain already change the spacing the eye sees.

