Cubic Leaves:

Leaves now have a simple new bushy look while keeping things blocky!
Unique designs for some of the different types of leaves.
Supports a ton of different mods!
Created to be as performant as it can be without significantly affecting visuals; the performance hit shouldn't be nearly as bad as other bushy leaves resource packs!

Resource Pack Editions:

Cubic Leaves (performance) # release versions
Faster Performance: Doesn't work with other resource packs. The bushy part of the leaves won't match the block if the textures are changed with another resource pack.
Cubic Leaves (resource pack compatible) # beta (now labled as release since CurseForge hides beta releases) versions
Slower Performance: Works with any resource pack! The bushy part of the leaves will match the block's texture when changed with another resource pack.