My previous experience with tiling comes from celestia, i made custom virtual textures for a few projects, creating a tree of levels, each (file) containing appropriately named raster tiles for height maps and color maps, the process was easy enough really.
I have created a very large set of custom data, a fictional planet that id like to make explorable in cesium, and I can export the data into tiles and rename them ofcourse. but im not too sure how i should name them and if i can keep the raster .png extension or it has to be converted?.
Under my logic a TMS format would be:
-1.0 / 0.0