Ashley
my biggest problem with tilemaps right now is not with seams but with these artifacts.
as you can see for some reason when the system crops the tilemap in the import process the tiles take one pixel of the above(and left ,right ,bottom) tile although they are perfectly aligned.
please notice how in your tilemap it has taken the top line from the above tile and just a bit on the left because the left tile has only this much to take.
on the right it takes none because it has no other tile there.
if i add 1px of transparency and instead of 128x128 i make them 129x129 then the artifacts disappear but then the tiles have 1 px seam between them.
why is this happening?
if i cut them in Photoshop and import them as sprites they do not have this 1px artifact.
the are perfect.
this happens with your stock c2 platformer tilemap as well.
it is driving me crazy! <img src="{SMILIES_PATH}/icon_cry.gif" alt=":cry:" title="Crying or Very Sad">
EDIT:because the pictures do not show here properly i attached them in their original resolution here:
https://www.dropbox.com/s/dq1auj4faoz73 ... .55.35.png
https://www.dropbox.com/s/m35nkclgmviea ... .51.32.png
https://www.dropbox.com/s/pvybifts7d3l0 ... .56.09.png