TMX

TMX is an image format used in each version of Persona 3 and Persona 4. It was used in almost all Atlus-developed titles up until Persona 5. TMX can range from 16 colors to 256 colors with alpha transparency. An official tool for creating TMX files from TGA files was leaked in the US version of SMT: Nocturne.

Persona 3/4
TMX is used in these titles for character bustups, HUDs, and logos. Sometimes these files are wrapped in SPR containers and/or PAC/BIN archives.

Format Specs
struct TMX { 	u16 tmxID; // tmxID is always 0x0002 u16 userID; // can be set by user u32 length; // length of entire tmx data char[4] tmxMagic; // "TMX0" or 0x30584D54 u32 pad1; // 0x00000000 u8 numPalettes; // typically either 0x00 or 0x01 u8 paletteFmt; // PSMCT32, PSMCT16, PSMCT16S u16 width; // width of image in pixels u16 height; // width of image in pixels u8 pixelFmt; // PSMT8, PSMT8H, PSMT4, PSMT4HL, PSMT4HH u8 numMipMaps; // number of mip maps present s16 mipKL; // if (mipKL == 0xFFFF) then values are not used // mipK = (mipKL & 0x0FFF) / (1 << 4) // mipL = (mipKL & 0xF000) // default mipK = -0,0625 // default mipL = 3 u8 reserved; // always 0x00 u8 wrapModes; // if (wrapModes == 0xFF) then values are not used // wrapX = (wrapModes & 0xC) >> 2 // wrapY = (wrapModes & 0x3) // 0 = REPEAT // 1 = CLAMP // default is REPEAT u32 userTextureID; // can be set by user u32 userClutID; // can be set by user char[28] userComment; // can be set by user }

Amicitia
Featured article: Amicitia (program) Amicitia is TGE's all-in-one editor for Persona formats. It features texture conversion from PNG (for both TMX and RMD). You can get it here.

TMX Explorer
TMX Explorer.exe was created by Blyss at XeNTaX in 2010 for viewing TMX files and extracting them as PNGs with transparency intact. To use it, just run the EXE in a folder with TMX images. The included zlib1.dll must be in the same directory in order to run. The tool can be found here.

BE0605.exe
BE0605.exe is Atlus's official TMX creation tool. It was found on the North American SMT: Nocturne disk, presumably used for localization. You can open TGA images and save them as TMX using this program to convert to TMX. You can also open TMX files in this program to view them and edit their palette/bpp. However, there are random glitches with this program where the TMX won't load properly. It is recommended to use either Amicitia (for TMX creation) or TMX Explorer (for viewing/extracting) instead, if possible. You can download it.