The 16 byte Fast3D vertex format contains five pieces of information:
Together, these 16 bytes of information form one complete vertex.
From actors/mario/actor.s:
vertex -9, 73, -34, 0, 0, 0xC2, 0x6B, 0xE6, 0x00 vertex -9, 73, 34, 0, 0, 0xBE, 0x6A, 0x12, 0x00 vertex 22, 82, -26, 0, 0, 0x07, 0x7E, 0xF5, 0x00 vertex 73, 11, 0, 0, 0, 0x7E, 0x04, 0x00, 0x00 vertex 55, -61, -36, 0, 0, 0x67, 0xBE, 0xE1, 0x00 vertex 44, -10, -92, 0, 0, 0x4F, 0xF2, 0x9E, 0x00 vertex 7, 33, 95, 0, 0, 0xE6, 0x26, 0x75, 0x00 vertex 44, -9, 92, 0, 0, 0x4F, 0xF2, 0x62, 0x00 vertex 43, 40, 91, 0, 0, 0x4E, 0x30, 0x57, 0x00 vertex 8, -8, -99, 0, 0, 0xF3, 0xEE, 0x84, 0x00 vertex 36, -51, -79, 0, 0, 0x30, 0xB8, 0xA4, 0x00 vertex 26, -74, -46, 0, 0, 0x18, 0x88, 0xE2, 0x00 vertex 36, -52, 79, 0, 0, 0x30, 0xB8, 0x5C, 0x00 vertex 26, -74, 45, 0, 0, 0x12, 0x88, 0x22, 0x00 vertex 55, -61, 36, 0, 0, 0x60, 0xB3, 0x1A, 0x00