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