farplane2 is a mod that lets thousands of blocks to be rendered,

yet theres one catch its only a level of detail renderer and does not increase fps ect,

I AM NOT THE OWNER OF THE MOD

Known Bugs:

1. Breaking blocks may cause the game to crash. This happens consistently, so avoid breaking blocks unless you know a workaround.

2. Throwing items using the usual drop key (Q) can also cause a crash. You can avoid this by manually dragging and dropping items out of your inventory.

heres the link to the     

 Mod Owner

there are two render modes: voxel: doesnt let you see far yet verry effective

HightMap: is the base of the mod that lets you thousonds to even a million blocks without having to deal with that much lag yet i reccomend you use voxel for low end pcs and ect,

there isnt much other then render distance increasing but i guess you can call it fun sometimes