What I expected to happen was to see the sky blue.
What actually happened was seeing the part of the sky black.
Steps to Reproduce:
1. go in a mine like the one in the picture
2. press F5 for looking from 3rd person
3. look towards clouds or to the sky
Tested in demo 1.7.1 in open in lan
Environment
Put your operating system (Windows 7, Windows XP, OSX) and Java version if you know it here
Forgot to add, viewable even in night time