Added earth surface texture

examples/scenes/landsat8.toml

@@ -3,15 +3,22 @@
 # comes from scripts/fetch-models.sh.
 #
 #   resolved render --scene examples/scenes/landsat8.toml --preview landsat8.png
+#   resolved render --scene examples/scenes/landsat8.toml --lighting L1 --preview landsat8.png
 
-sun = [111172883513, -100100513931, 0]
+sun = [145154174600, -36191000457, 0]
 moon = [0, 0, -3.844e8]
+# Earth-fixed to inertial: 25 N 33 E behind the spacecraft, looking north.
+earth_attitude = [0.662448702, -0.690270337, -0.153384684, -0.247308951]
 
 [observer]
 position = [7083216.12, -150.19, 0.00]
 look_at = [7083137.00, 0.00, 0.00]
 up = [1, 0, 0]
 
+# At lighting L1, Earth's surface shows July (from scripts/fetch-earth.sh).
+[appearance]
+earth_month = 7
+
 [[target]]
 model = "../models/nasa/landsat8.glb"
 scale = 1.0