Added earth surface texture

examples/scenes/ostm.toml

@@ -3,15 +3,22 @@
 # comes from scripts/fetch-models.sh.
 #
 #   resolved render --scene examples/scenes/ostm.toml --preview ostm.png
+#   resolved render --scene examples/scenes/ostm.toml --lighting L1 --preview ostm.png
 
-sun = [125463331183, -81476839938, 0]
+sun = [148141994506, -20819999562, 0]
 moon = [0, 0, -3.844e8]
+# Earth-fixed to inertial: 25 N 33 E behind the spacecraft, looking north.
+earth_attitude = [0.675405688, -0.680462708, -0.192277152, -0.209349365]
 
 [observer]
 position = [7714190.15, -72.55, 0.00]
 look_at = [7714137.00, 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/ostm.glb"
 scale = 3.5