I have recently come across a plug in that removes the void fog that appears when you are close to bedrock. This makes it look more like it did in 1.7 and is a plugin i recommend everyone should use.

http://lahwran.net/NoVoidFog-v1-1.8.zip

Ps goto the Book Case Thread and start creating <object class="emojione" data="https://resources.enjin.com/1489581540/themes/core/images/emojione/svg/1f642.svg?0" type="image/svg+xml" standby=":)">:)</object>