Set a sane default value for ground albedo in Sky::Planet

diff --git a/source/effects/sky.cpp b/source/effects/sky.cpp
index 158606f845305dcbef7f206fc706328faf01bfe9..855509d15a3c1affb3dcc61dd41986f4decd3ae4 100644 (file)
--- a/source/effects/sky.cpp
+++ b/source/effects/sky.cpp
@@ -163,7 +163,8 @@ Sky::Planet::Planet():
        ozone_band_center(1e4f),
        ozone_band_extent(1e2f),
        atmosphere_thickness(2e4f),
-       planet_radius(1e6f)
+       planet_radius(1e6f),
+       ground_albedo(0.2f)
 { }
 
 Sky::Planet Sky::Planet::earth()