strider, are those two screenshots taken over the same location and same exact time and date? I just double checked our settings for this effect and they are identical between SMP 1.1 and 1.3. Your latitude / longitude, the phase and position of the moon, and the amount of twilight all play a role in cloud lighting just after sunset, and even minor changes in location or time can make a big difference. That's not to say there isn't further room for improvement. The real issue here is that we basically need to reverse-engineer X-Plane's lighting and ephemeris model in order to try and light our clouds consistently with X-Plane's sky. Sometimes X-Plane's model and ours differ by a few minutes, and that leads to small windows of mismatched lighting.