1st level (level 0 internal)
random pattern - 1st level (level 0 internal)
2nd level (level1 internal)
3rd level (level2 internal)
Seems that very iconic stuff is a bad thing (like the level shape). the original hex pattern is ideal because its a pattern with small repeatable shapes. Also what really works is placing stuff either in the center of the texture or the corners (since the background is tiled)