so after long battle with LOD i got new problem
CK dont save landscape texture anymore :

here i edited cell
http://img176.imagevenue.com/img.php?image=327040508_ck1_122_33lo.JPG

here i closed landscape editing dialog window and pressed "save"
http://img223.imagevenue.com/img.php?image=327044105_ck2_122_793lo.JPG

closed CK, loaded plugin again and got nothing
good job!

http://img269.imagevenue.com/img.php?image=732704651_ck3_122_574lo.JPG

found after editing 30 cells

yes its custom texture which work on bunch of other cells(incude that one above), anyway i have to make landscape texture record inside plugin for oscape.