diff --git a/SceneGeom.cpp b/SceneGeom.cpp
index cd6c64c..ee74b1b 100644
--- a/SceneGeom.cpp
+++ b/SceneGeom.cpp
@@ -350,14 +350,14 @@ Scene::DrawGeoObj( const IGdbIterator& iIter, int nPass, const MdStMkCol& siObj)
             Material mMat ;
             if ( ! iIter.GetCalcMaterial( mMat))
                mMat.Set( m_colDef) ;
-           // secondo materiale per parti lavorate (tonalità spostata di 22.5 deg)
+           // secondo materiale per parti lavorate (tonalità spostata di 18 deg)
             Color cCol2 = siObj.colObj ;
             Material mMat2( mMat) ;
             // se richiesto diverso
             if (( m_nShowZmap & ZSM_COLORS) != 0) {
                HSV hsv = GetHSVFromColor( siObj.colObj) ;
-               hsv.dHue += ANG_RIGHT / 4 ;
-               hsv.dVal *= 0.9 ;
+               hsv.dHue += ANG_RIGHT / 5 ;
+               hsv.dVal *= 1.2 ;
                cCol2 = GetColorFromHSV( hsv) ;
                mMat2.Set( cCol2) ;
             }