diff --git a/LuaLibs/ProcessCut.lua b/LuaLibs/ProcessCut.lua
index 1b22d5c..2205a51 100644
--- a/LuaLibs/ProcessCut.lua
+++ b/LuaLibs/ProcessCut.lua
@@ -405,8 +405,8 @@ local function MakeFromTop( sCutting, Proc, nPhase, nRawId, nPartId, dOvmHead, b
             EgtSetInfo( vCuts[i][j], 'TASKID', Proc.TaskId)
             if ( i % 2) == 1 then
                local vtO = EgtSurfTmFacetNormVersor( vCuts[i][j], 0, GDB_ID.ROOT)
-               if ( vtN:getY() > 0.707 and vtO:getY() < -0.05) or
-                  ( vtN:getY() < -0.707 and vtO:getY() > 0.05) then
+               if ( vtN:getY() > 0.766 and vtO:getY() < -0.05) or
+                  ( vtN:getY() < -0.766 and vtO:getY() > 0.05) then
                   EgtInvertSurf( vCuts[i][j])
                   bOrthInv = true
                end