So I set up my first character, did some animations, got everything working in Unity with the current versions of Spine, Unity, TK2D, and the spine runtimes. Worked a charm.
So I decided to add start adding skins to this test rig. Went about adding all the skin placeholders and sets of images and attaching those. Export again and go through the workflow (creating atlases, skeleton data, etc). This time nothing displays. There's an option to toggle between the skins on the Spine SkeletonAnimation object, but neither show anything. I tried repeating steps over and over and tried flattening the directory structure for the images. Nothing worked.
So I went back to the absolute basics. 1 bone, 2 skins (1 image each). Nothing displays. I delete the skin placeholder and attach an image to the bone's slot and export again and it displays.
Thanks in advance