diff --git a/src/Main/main.cxx b/src/Main/main.cxx
index caad35736..34d857a87 100644
--- a/src/Main/main.cxx
+++ b/src/Main/main.cxx
@@ -416,7 +416,7 @@ void fgRenderFrame( void ) {
 
         fog_exp_density = m_log01 / actual_visibility;
         fog_exp2_density = sqrt_m_log01 / actual_visibility;
-        fog_exp2_punch_through = sqrt_m_log01 / ( actual_visibility * 4.0 );
+        fog_exp2_punch_through = sqrt_m_log01 / ( actual_visibility * 2.5 );
     }
 
     // double angle;
diff --git a/tests/test-env-map.cxx b/tests/test-env-map.cxx
index ada7b37be..55498086e 100644
--- a/tests/test-env-map.cxx
+++ b/tests/test-env-map.cxx
@@ -151,7 +151,6 @@ void display()
   glEnable(GL_TEXTURE_GEN_S);
   glEnable(GL_TEXTURE_GEN_T);
 
-  /*
   glBegin(GL_QUADS);
   glNormal3f(0.0, 0.0, 1.0);
   glVertex3f(1.0, 1.0, 0.0);
@@ -159,13 +158,14 @@ void display()
   glVertex3f(-1.0, -1.0, 0.0);
   glVertex3f(1.0, -1.0, 0.0);
   glEnd();
-  */
 
+  /*
   glPointSize(48.0);
   glBegin(GL_POINTS);
   glNormal3f(0.0, 0.0, 1.0);
   glVertex3f(0.0, 0.0, 0.0);
   glEnd();
+  */
 
   glDisable(GL_TEXTURE_GEN_S);
   glDisable(GL_TEXTURE_GEN_T);