In TFC, there are twenty one rock types, and they all have had the same vanilla cobble pattern. Actual rocks of each type break very differently from one another, with various patterns textures and details.
These are my renditions of the 21 rock types of cobble for TFC.
There are a good number of rocks in the rock garden that match these types, and so I can detail them rather precisely, considering a 16x grid.
There is more to come, I have also designed brick patterns for a few of them, however the cobble designs fit with TFC more closely.
I'm getting the details a lot closer to how each IRL rock type looks, while keeping the general colors approximate to TFC. The cobble patterns also determine the patterns on the cobble walls.
Now for an update: I've decided to make all the blocks that TFC has, and have made significant progress in many areas.
There are 21 rock types:
+ Cobble is mostly fleshed out, with a few fiddly-bits left to do.
+ Stonebricks are nearly to the stage as the cobble.
+ Gravel has a pattern fleshed out, more on the way.
= Smooth is experimental atm.
There are 27 tree types:
+ Log centers are done, adjust to fit bark when that is done.
+ Leaves are roughed in, conifers fleshed out.
= lots of bark left to do
+ Straw block
+ Iron Fences
A good assortment of fiddly-bits done, including the sun and several moons, two of which are shown now as they are designed to help new players learn the most important recipes in TFC. Instead of taking time out of game to look up the wiki, one simply needs to look up at the moon, that contains the 5x5 patterns for the main tools in the game, making the experience a lot more immersive for new players!
There are a few more less-helpful moons for more advanced players, who can swap them out for personal taste