Iterate terrain blocks

#1 Not sure what you mean, the terrain is already seemlessly repeated when you get to the end of the terrainblock.

#2 I think he wants to loop through the tb's via c++ code to-do some kind of manipulation

have a look in the terrain*.cc files

#3 Actually, what I'm thinking of is a method to 'paint' foliage. I have good code chunks in all the fxReplicator files that control placement and rendering. I'm just not happy with how they pick areas.
So, I'm pondering a method of looping the terrain blocks, the 8x8 chunks, and deciding the type and shape of my replication based on the predominate texture. I would only do this once, so it would be no slower than the dozens of replicators I now use.
I haven't fully thought this out, nor looked over any current terrain file, just yet. It's still at that 'Hmm, I wonder' stage :)

#4 TerrData.cc would be a good place to start looking for example code. They do a variety of parsing (from shadow generation to rendering, etc.) through the terrain itself.

#5 There was also a resource that allows you to be able to move only when on certain textures(to keep you on a path, for instance). You can look in there for sampling the terrain textures, and use the results to modify what replication occurs in those areas.