Added earth surface texture

examples/scenes/ace.toml

@@ -4,15 +4,22 @@
 # comes from scripts/fetch-models.sh.
 #
 #   resolved render --scene examples/scenes/ace.toml --preview ace.png
+#   resolved render --scene examples/scenes/ace.toml --lighting L1 --preview ace.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 = [0.660019964, -0.691724929, -0.146685455, -0.253719624]
 
 [observer]
 position = [7000036.38, -73.51, 0.00]
 look_at = [7000000.00, 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/ace.glb"
 scale = 0.00485