SonPLN is a new plane mappings editor, based on SonLVL. For those who don't know, plane mappings are used to store an arrangement of tiles to be displayed on one of the Megadrive's two scroll planes. Usually these are things that don't move much, like the title screen emblem, or the level select text. Features: INI-based project file stores data for multiple sets of mappings in a single file, making switching between sets in the editor easy. Based on SonLVL's foreground layout editor, includes ability to select and modify sections of the mappings all at once. Includes zoom and grid features. Includes tile editor, palette editor, and import/export features from SonLVL. Ability to resize the current mappings set (note: you will need to edit the ASM code to make the game load it correctly). Text Editing SonPLN features advanced text editing capabilities. Simply select an area you wish to edit by dragging with the right mouse button held, then right click inside the selection and choose "Edit Text". All the text in the selected area will be converted to strings, which you can then edit in the dialog shown above. All non-text tiles in the area will be blanked out, so be careful (it will warn you before doing so). SonPLN is capable of mapping more than just letters and numbers, as seen above, symbols are also available (only characters in the Unicode BMP (0000-FFFF)). To enable text editing, your mappings definition in the project file must declare a text mapping, which can be defined as a simple string in the textmap field for single-tile letters, or a path to a separate ini file in the textmapfile field for multi-tile letters. The simple format begins with a single character (A) or a pair of characters separated by a hyphen (A-Z) to indicate a range of characters, followed by an optional colon and a tile index in hex or decimal, and a pipe character to mark the end of one definition and the beginning of another. If the colon and index are omitted, the character will be assigned the index immediately following the previous character/range of characters. The complex format begins with specifications for the Height of all characters in the font and a DefaultWidth to be used if the characters don't override it. Then you begin defining the characters, starting with the character itself in brackets [A], followed by an optional Width, and definitions for all the tiles to be used in each row. Code: Height=2 DefaultWidth=2 [A] Row1=1, 2 Row2=3, 4 [I] Width=1 Row1=0xE Row2=0xF [.] Width=1 Row1=0 ; all characters must be same height, so we put a blank tile here Row2=0x20 Download You can download SonPLN from the SonLVL Updater, or on this page. Also, a project file for the Sonic 2 GitHub disassembly can be found... on the Sonic 2 disassembly GitHub!