See: MinecraftForge/MinecraftForge#6537

Since it is now merged, reimplement the following:

• Stars in Purple Agate skies
• Smooth sky transitions
• Modify Cloud colour (may need to be in a CloudRenderer)
• Remove the Moon (since we now have our own renderer, we can now control celestial objects)

To look at later (not necessary):

• Custom effects in the following biomes
  • Smoldering Bog
  • Shining Grove
  • Volcanic Lands
  • Goldstone Lands
  • Static Wasteland
• Totally new sky effects across all of Gaia?
• New Sun texture. Scale it up?