Many polys will share the same 3 textures, but each poly will need to display specific portions of those textures (tiles within a tileset).
Currently, each tile is a separate object (mesh) and therefore separate surface. By merging multiple tiles in the same mesh (sharing surfaces) I can get a potentially massive increase in rendering speed.
Currently, each tile is a separate object (mesh) and therefore separate surface. By merging multiple tiles in the same mesh (sharing surfaces) I can get a potentially massive increase in rendering speed.