The Double Cut Seam
Wallcovering installations are created with a 1″ overlap between 54″ ( or less) wallcovering panels. A double cut (through both panel edges) is applied with a simple knife cut through the verical lenght of the matched panels.
This double cut method provides a seam with no overlaps - crucial with thick materials.
Because this is how installers always install wallcovering, make sure your printing/panelization software is set to include a 1″ overlap between panels.
One more comment -With any seam, it is possible that the raw vinyl color (white) will show through. A wise wallcovering installer will carry with him touchup markers for cleaning up any ‘bad’ seams.
A good set of wallcovering mural installations can be found here, at the OMNOVA website.