diff --git a/LuaLibs/BeamLib.lua b/LuaLibs/BeamLib.lua
index f7ab298..c9a5be5 100644
--- a/LuaLibs/BeamLib.lua
+++ b/LuaLibs/BeamLib.lua
@@ -308,7 +308,7 @@ function BeamLib.GetNearestOrthoOpposite( vtRef, vtNorm)
       vtMyRef:normalize()
    end
    -- se prevalente una componente orizzontale (con piccolissimo vantaggio)
-   if abs( vtMyRef:getX()) > 0.95 * abs( vtMyRef:getZ()) or abs( vtMyRef:getY()) > 0.95 * abs( vtMyRef:getZ()) then
+   if abs( vtMyRef:getX()) > 0.91 * abs( vtMyRef:getZ()) or abs( vtMyRef:getY()) > 0.91 * abs( vtMyRef:getZ()) then
       -- se prevale la componente destra/sinistra
       if abs( vtMyRef:getX()) > 0.95 * abs( vtMyRef:getY()) then
          if vtMyRef:getX() > -GEO.EPS_SMALL then