LB Photo Realism Reload!
You can see the lastest development news [here]
P.S. check out my semi-vanilla textures side project!
"LB Photo Realism Reload!" is a photo realistic resourcepack based on work of Scuttles (LB Photo Realism). "Reloaded" version is very different from the original, because it uses very old textures of LBPR. The main purpose of this resourcepack is to make minecraft look not only as realistic as possible, but also to make it look beautiful and attractive to new players. LBPR Reload is pretty close to default Minecraft textures, so it won't be a big issue to start playing with it. The pack includes many 3D-models, animations and random textures.
Switch your graphics to Fancy
Or if you use Optifine, go to Video Settings > Details and set Trees to Smart