Its's The default look of Minecraft with Bushy Leaves!!!

Fair warning you can see some clipping of the leaves (Merge through each other)
and there is some randomness to the leaves so it might look interesting when they aren't used for trees.
But it's overall more pleasant to look at then the square Blocks ...

I Advise you turn on the Options.../Video Settings.../Graphics : Fancy
And if you're playing with Optifine and you really want your options on Simple
then head over to the Options.../Video Settings.../Details.../Trees : Smart or Fancy

otherwise the transparent areas will turn black...

>How to use
download it
unzip it
put it in your resourcepacks folder

>Where is my resourcepacks folder
Windows Key+R
Type %appdata%
Then .minecraft\resourcepacks


Notes Pictures are taken without Optifine.
Leaves react normally (swap colors depending on the biome)