I love C&B to death but one thing that has made me sad since I began using it is it cannot reproduce fences as mobs and players can hop right over the 1 block height. It is possible to build a second level on top but that is visible and no longer looks like a normal fence. It might be nice to have a way to extend the hit box above a structure or a way to make a structure invisible but still blocking.

Here's one way, but it need a new, fully transparent, glass texture. It will be physical block but fully invisible.

I believe this would be best handled not by C&B but by a mod with an invisible block.. maybe one that can be toggled as visible or invisible. ( it should be compatible with C&B Obviously )

I'm not sure if that makes sense for FCB ( transparent... is a flat color? probably not.. )

But on the same token I'm not sure it makes sense to make a "Solid Air" Mod either... Hmm..

The problem with a transparent or like blocks that I've found however is it blocks projectiles like arrows and clicking through. A fence only blocks projectiles and clicking for its visible height but blocks movement for the additional height.

In any case I love C&B, it is a work of art, literally and figuratively.

Because mobs jumps at 1block height, we can add just few bits of that glass on top of the fence.

That actually seems to work pretty darn well, thank you Dushess! Never knew they didn't just as high as a player.