Ah, I don't use the tk2d camera. I started using a regular perspective cam + ortho sorting back when the tk2d cam wasn't able to handle perspective and zoom. I also make use of an AspectRatioEnforcer that modifies my main cam. I'm afraid that switching to tk2d cam now will break my current solution.
are you saying that if I place a tk2d cam on the stage and correctly set the ppm, any future tile maps I create will start at the right size?
or do I just need to set the ppm for the sprite collection that contains my tiles, and the tiles will appear at the right size?
Defaultly, my camera sits at Z -10, while everything else is at Z 0. The documentation talks about the use of pixels per meter, but I've never been 100% how to actually calculate the ppm that I need.