Mega taiga biome only, strange particles

Creative mod
In mega biome from custumization menu, appearing some strange pixels,
problems:cant see whats in other side, i can see whats in down left right in every direction even if there is normally a huge hill in front of me.
Also i added and this time ocean lavas/rivers=true.
In 1.8 pre1 lavas and mega biomes were good as i remember
I have a clue, maybe its has to do with...cows!