[MC-69674] Standing on soulsand will darken the sky

1st image - standing on soulsand
2nd image - standing on sandstone

Environment

MC 1.8-pre2
Java 64-bit
Fast graphics
2 ch. render distance

~~Not a duplicate of MC-47591, this one does not describe minecarts or boats.~~

Kumasasa from MC-47713:

The dark sky issue is partly included in MC-47591 , but feel free to make another ticket of this issue.

If someone made the ticket @unknown described, this is a duplicate of that one. Else, it is a duplicate of MC-47591.

Relinked to MC-51150