3 lines as material to work with:
rr = Plot[Sin[x], {x, 0, 10}, Background -> Brown]
ar = Table[rr, {3}, {3}];
gr = Grid[ar, Frame -> All, FrameStyle -> Directive[{Thickness[3], Red}], Spacings -> {0, 0}]
Evaluate
Export["pic.gif", gr, "GIF"]
Export["pic.png", gr, "PNG"]
Export["pic.svg", gr, "SVG"]
A normal export without any cloud involved shows already the artifact. If a setting of Background->Brown is used in the Export is shows:
There is a way to remove the stitching error.
as = ImagePad[ImageAssemble[ar],2,Red]
CloudExport[as, "GIF"]
The picture is now stitched with ImageAssemble and a border is added with ImagePad. The result is a perfect picture.
Note: I was under the impression that CloudDeploy didn't produce the stitching artifacts but it also does when grid with pictures is mixed.
the ImageAssembled picture is 1 big picture while the Grid solution contains 9 individual pictures. So my question is if it is possible to mix Grid and Images without stitching errors or is it impossible to mix. Do I gain load time of the page with this?