diff --git a/Nasal/local_weather/local_weather.nas b/Nasal/local_weather/local_weather.nas
index 6dfce61c9..f16b58118 100644
--- a/Nasal/local_weather/local_weather.nas
+++ b/Nasal/local_weather/local_weather.nas
@@ -792,6 +792,30 @@ compat_layer.setDewpoint(D);
 if (p>0.0) {compat_layer.setPressure(p);}
 
 
+# determine whether low haze is icy and whether we see scattering 
+
+var ice_hex_sheet = 0.0;
+var ice_hex_column = 0.0;
+
+if (T < -5.0)
+	{
+	ice_hex_column = (-T - 5.0) /10.0;
+	ice_hex_sheet = (-T - 10.0 + (T-D)) /20.0;
+
+
+	var sheet_bias = (T-D)/ 20;
+	if (sheet_bias > 1.0) {sheet_bias = 1.0;}
+	ice_hex_column = ice_hex_column * sheet_bias;
+	
+	if (ice_hex_sheet > 1.0) {ice_hex_sheet = 1.0;}
+	if (ice_hex_column > 1.0) {ice_hex_column = 1.0;}
+	}
+	#print("Col: ",ice_hex_column);
+	#print("Sheet: ", ice_hex_sheet);
+
+setprop("/environment/scattering-phenomena/ice-hexagonal-column-factor", ice_hex_column);
+setprop("/environment/scattering-phenomena/ice-hexagonal-sheet-factor", ice_hex_sheet);
+
 # now determine the local wind 
 
 
diff --git a/Nasal/local_weather/weather_tiles.nas b/Nasal/local_weather/weather_tiles.nas
index 9ff43d635..f409bb802 100644
--- a/Nasal/local_weather/weather_tiles.nas
+++ b/Nasal/local_weather/weather_tiles.nas
@@ -1701,7 +1701,7 @@ calc_geo(blat);
 
 var vis = 9000.0 + rand() * 10000.0;
 var T = 10.0 + rand() * 15.0;
-var spread = 6.0 + 2.0 * rand();
+var spread = 8.0 + 4.0 * rand();
 var D = T - spread;
 var p = 1000 + rand() * 10.0; p = adjust_p(p);