I have been giving my patterns backgrounds by filling a bounding box and placing it behind the objects in pattern editing mode. The pattern i am working on is about four flower png shapes I've arranged over the edges to create seamless repeat. I prefer to make patterns on illustrator as I struggle to use Photoshops offset method (and photoshop in general :s)
However I have just realised that this background box is breaking up the patterns seamless repeat ... As if the background object is being treated as a clipping mask...
Selecting size tile to art doesn't make a difference.
Is there anyway to add a background colour to a pattern swatch without this happening?
You can add a background fill by adding a new fill below the pattern in the Appearance panel, you don't need to change the pattern.If you want to create a variation of the pattern with an added fill, you can try this:Drag the pattern swatch from the Swatches panel to the Artboard.In the Layers panel look for a path at the bottom of the pattern group and select it.Copy the path.Fill it with a color.Choose Edit > Paste in Back.Select the entire pattern group and drag it back to the Swatches panel.