diff --git a/LuaLibs/ProcessCut.lua b/LuaLibs/ProcessCut.lua
index 969dd2b..a23a3e5 100644
--- a/LuaLibs/ProcessCut.lua
+++ b/LuaLibs/ProcessCut.lua
@@ -1,4 +1,4 @@
--- ProcessCut.lua by Egaltech s.r.l. 2019/11/26
+-- ProcessCut.lua by Egaltech s.r.l. 2020/01/07
 -- Gestione calcolo singoli tagli di lama per Travi
 
 -- Tabella per definizione modulo
@@ -167,9 +167,9 @@ function ProcessCut.Make( Proc, nPhase, nRawId, nPartId, dOvmHead, bFromBottom)
          vtOrthoO = -Z_AX()
       elseif bHorizCut then
          vtOrthoO = Z_AX()
-      elseif abs( vtN:getY()) > 0.02 and Proc.Head then
+      elseif Proc.Head and b3Solid:getDimX() < BD.LEN_SHORT_PART and abs( vtN:getY()) > 0.02 and dCutV < dMaxDepth + 10 * GEO.EPS_SMALL then
          vtOrthoO = X_AX()
-      elseif abs( vtN:getY()) > 0.02 and Proc.Tail then
+      elseif Proc.Tail and b3Solid:getDimX() < BD.LEN_SHORT_PART and abs( vtN:getY()) > 0.02 and dCutV < dMaxDepth + 10 * GEO.EPS_SMALL then
          vtOrthoO = -X_AX()
       elseif vtN:getY() > -0.02 then
          vtOrthoO = Y_AX()
diff --git a/ShowSolid.lua b/ShowSolid.lua
index d3cf516..9d3e42f 100644
--- a/ShowSolid.lua
+++ b/ShowSolid.lua
@@ -1,4 +1,4 @@
--- ShowSolid.lua by Egaltech s.r.l. 2019/11/22
+-- ShowSolid.lua by Egaltech s.r.l. 2020/01/03
 -- Gestione calcolo solido di una Trave
 
 require( 'EgtBase')
@@ -17,6 +17,52 @@ local function Show( PartId, bSolid)
    EgtSetStatus( SolidLy or GDB_ID.NULL, EgtIf( bSolid, GDB_ST.ON, GDB_ST.OFF))
 end
 
+-- Funzione per regolarizzare, se necessario, la superficie della feature
+local function RegularizeTriMesh( SurfId, DestGrpId, dStep)
+   -- solo per superfici trimesh con poche facce (max4)
+   local nFacetCnt = EgtSurfTmFacetCount( SurfId)
+   if nFacetCnt > 4 then
+      return SurfId
+   end
+   -- box della superficie
+   local b3Surf = EgtGetBBox( SurfId, GDB_BB.STANDARD)
+   if b3Surf:getDimX() < 2 * dStep then
+      return SurfId
+   end
+   -- recupero le facce e le divido in X
+   local dXmin = b3Surf:getMin():getX() - 1
+   local dXmax = b3Surf:getMax():getX() + 1
+   local nStep = floor( ( dXmax - dXmin) / dStep + 0.9)
+   dStep = ( dXmax - dXmin) / nStep
+   local NewSurfId
+   for nF = 0, nFacetCnt - 1 do
+      local FacId = EgtCopySurfTmFacet( SurfId, nF, DestGrpId)
+      local b3Fac = EgtGetBBox( FacId, GDB_BB.STANDARD)
+      local dX2 = dXmin
+      for nI = 1, nStep do
+         local dX1 = dX2
+         dX2 = dX2 + dStep
+         if b3Fac:getMin():getX() < dX2 and b3Fac:getMax():getX() > dX1 then
+            EgtCutSurfTmPlane( FacId, Point3d( dX1, 0, 0), -X_AX(), true) 
+            EgtCutSurfTmPlane( FacId, Point3d( dX2, 0, 0), X_AX(), false)
+            local LoopId = EgtExtractSurfTmFacetLoops( FacId, 0, DestGrpId)
+            EgtApproxCurve( LoopId, GDB_CA.LINES , 0.01)
+            local TmpSurfId = EgtSurfTmByFlatContour( DestGrpId, LoopId, 0.01)
+            EgtErase( LoopId)
+            if NewSurfId then
+               NewSurfId = EgtSurfTmBySewing( DestGrpId, {NewSurfId, TmpSurfId})
+            else
+               NewSurfId = TmpSurfId
+            end
+            EgtErase( FacId)
+            FacId = EgtCopySurfTmFacet( SurfId, nF, DestGrpId)
+         end
+      end
+      EgtErase( FacId)
+   end
+   return NewSurfId
+end
+
 -- Recupero il pezzo del primo oggetto selezionato
 local ObjId = EgtGetFirstSelectedObj()
 local PartId = EgtGetParent( EgtGetParent( ObjId or GDB_ID.NULL) or GDB_ID.NULL)
@@ -42,7 +88,8 @@ if not SolidLy then
 end
 local SolidId = EgtGetFirstNameInGroup( SolidLy, 'Solid')
 if not SolidId then
-   SolidId = EgtCopyGlob( BoxId, SolidLy)
+   --SolidId = EgtCopyGlob( BoxId, SolidLy)
+   SolidId = EgtSurfTmBBox( SolidLy, EgtGetBBoxGlob( BoxId, GDB_BB.STANDARD), true, GDB_RT.GLOB)
    EgtSetName( SolidId, 'Solid')
    EgtSetColor( SolidId, Color3d( 228, 196, 64))
    Show( PartId, true)
@@ -51,13 +98,19 @@ else
    EgtDraw()
    return
 end
+local b3Solid = EgtGetBBox( SolidId, GDB_BB.STANDARD)
+local dStep = 1.23 * min( max( b3Solid:getDimY(), b3Solid:getDimZ()), 2 * min( b3Solid:getDimY(), b3Solid:getDimZ()))
 
 -- Ciclo sulle features
 local ProcLy = EgtGetFirstNameInGroup( PartId, 'Processings')
 local ProcId = EgtGetFirstInGroup( ProcLy)
 while ProcId do
    if EgtGetInfo( ProcId, 'DO', 'i') ~= 0 and EgtGetType( ProcId) == GDB_TY.SRF_MESH  then
-      EgtSurfTmIntersect( SolidId, ProcId)
+      local NewSurfId = RegularizeTriMesh( ProcId, SolidLy, dStep)
+      EgtSurfTmIntersect( SolidId, NewSurfId)
+      if NewSurfId ~= ProcId then
+         EgtErase( NewSurfId)
+      end
    end
    ProcId = EgtGetNext( ProcId)
 end