Assorted fixes

- use nussun's Earth night texture
- make roughsphere.cms actually spherical so it works with SemiAxes
- change Saturn's ring radii to match the new texture

README

@@ -64,8 +64,6 @@ Texture maps
    and improved by the specular map derived from Natural Earth II by Tom Patterson
       http://www.shadedrelief.com/natural3/pages/extra.html
    Normal map derived from the BMNG datadet.
-   Night texture derived from BMNG dataset and colored with a night texture by JVV, posted on the Celestia forum:
-      http://celestia.space/forum/viewtopic.php?f=23&t=17477
    Cloud Texture from the BMNG dataset
 
    Moon:
@@ -128,6 +126,12 @@ Texture maps
   (http://www.johnstonsarchive.net/spaceart/cylmaps.html), and further modified
   by Jens Meyer, Grant Hutchison, and Askaniy.
 
+# Earth's night texture created by FarGetaNik from the BMNG dataset and colored
+  with a night texture by JVV, posted on the Celestia forum:
+    http://celestia.space/forum/viewtopic.php?f=23&t=17477
+  and further improved by nussun based on a NASA Earth Observatory image:
+    https://earthobservatory.nasa.gov/features/NightLights/page3.php
+
 # Titan's surface texture is a composite of Cassini ISS and Radar maps from USGS,
   created by FarGetaNik and further modified by Askaniy. Titan's specular texture
   is by Askaniy. Titan's cloud texture is by Fridger Schrempp, based on resources

data/solarsys.ssc

@@ -700,8 +700,8 @@ AltSurface "Limit of knowledge" "Sol/Jupiter/Callisto"
 	TempDiscrepancy	52.5  # for 1 bar level
 	Rings
 	{
-		Inner	74500
-		Outer	140220
+		Inner	74510
+		Outer	140245
 		Texture	"saturn-rings.*"
 	}
 	InfoURL	"https://en.wikipedia.org/wiki/Saturn"

models/roughsphere.cms

@@ -4,7 +4,7 @@
 
 SphereDisplacementMesh
 {
-	Size [ 0.9 1.0 0.95 ]
+	Size [ 1.0 1.0 1.0 ]
 	NoiseOffset [ 17 42 45 ]
 	FeatureHeight  0.2
 	Octaves 2