The tiles shouldn't be to big (especially the frame tiles). The tile image I posted is the original size that is used by CEGUI currently (they look tiny but give big buttons and windows ingame). The GUI tiles don't need to be bigger. Quite the contary even, they should be just as big to hold the
minimum pixels needed to store all graphical "information" needed to display a button.
Examples:
- if a button should only have a one-color background, then a tile with exactly ONE pixel would be enough (well, that'd be overdoing the "minimum-storage-way" to much
- I'd do something like a 5x5 pixel area for that ).
- If we want a round frame border, the the tile should be just as big/small so that you can insert a roundish tile (7x7 pixels or something with antialiasing/transparency).
The 9 tiny redish tiles in the posted tile picture are currently used to create the counters, minimap and tab controls - that's all that is needed.