I’m using Tiled and the ponytiled plugin for my game, so I have lots of images packed next to each other. They look fine on the Corona Simulator, but have visible seams when testing on a device.
Going to reference a really old post because this issue has been around for ages… literally.
Hope it can be insightful to you. I personally dealt with this recently and tried to replicate it in an isolated project in the Simulator with no luck.
I fixed this using Texture Packer to extrude the borders of each tile, and imported it into Tiled with the correct margin and spacing. The map loaded into my game without seams on any device.
I posted this in the Tiled forum because I couldn’t find this information anywhere, so just in case others search for this are also confused:
Margin is the size of your extruded border in pixels, in my case 2.
Spacing is the space between your tiles, excluding the border pixels. Because there are 2 border pixels on both sides of each of my tiles, there is a spacing of 4 pixels between tiles.