What is Better Grass and Leaves? I looked at it on the minecraftforums but it didn't make any sense.
Anyway to achieve this level of detail you're going to need some beefy hardware. I personally have a 3770k OCd to 4.2 GHz, 2 EVGA 770 GTX in SLI (single monitor performance) and 16 gigs of G.Skill 2000 MHz RAM. The ram clocks don't matter but they sure help draw things faster so you aren't stuttering. It's noticeable.
Anyway, I use SEUS' 10.1 Preview 2 shaders. Before you drop the shader jar into your mod folder turn on mipmapping to max (optifine) and have trilinear filtering enabled. Disable antialiasing -- it won't be compatible with shaders.
Set graphics to Fast, set Details to high quality in the details submenu. Once you've got all that installed, go to your video control panel (I can't speak for ATI) and set global anisotropic filtering to ON and turn threaded optimization OFF. Set chunk loading to multi-core if it behaves, otherwise set it to default. Set render distance to Extreme, or Far + 224. Extreme can sometimes cause chunks to wipe in your cache and continually redraw. YMMV so pick what orks for you.
Now drop the shader jar in /mods and the shader pack in minecraft/shaderpacks and run your game. In the shaders settings supersample your image by turning up render quality to 2, and shadow render quality to 4. Tweak lighting until it's creating a presentable image. Go into your shaders and mess around with composite.fsh and fine-tune your outdoor settings. Sometimes you can get some nice ambient occlusion effects. The idea with tweaking the shader files is you are trying to prevent the image from being too washed out if you have the sun in the image. It also can tune the warmth or coolness of the image. A lot of shaders have a hard time managing what you see if the sun is in the image, either causing a total washout or a very strong silhouette.
What you will wind up with with my setup is a playable 30-40 FPS. If you've got a screaming fast processor you can probably get away with 40-50, and if you've got couple of Titans you might be hitting 60 FPS.
Snap away! Be sure to set times and angles to suit you.