It's not pretty, this was just me trying to wrap my head around when an area of the tile map was blit and why. It's an xcf, because I use gimp, not sure if photochop will open it. But it probably will. There's also a png, but it doesn't have layers. It's scaled up by a ratio of 16:1.
Thanks - I can confirm XCF files do not work in photoshop. I attached the PSD conversion of Omnipotent's file - since GIMP Group Layers are not supported in PSD export. So it is a converted from - remade in PS. == Also another good guide http://community.playstarbound.com/index.php?threads/how-tile-textures-work.44646/#post-1443356
This. Both of these threads. I spent the last hour banging my head against this question - you just saved me another three of doing what you've already done. -Sevi