There are quite a few jungle-themed cmpns, scns, and rms's floating around in the BS (that's short for Blacksmith). Here are my personal tips for an interesting jungle:

Put clumps of jungle terrain, some big, some not too big, and some tiny. Fill gaps between jungles with dirt (delete all unwanted cacti), dirt2, dirt3, grass3 (for bigger gaps between clumps of jungle), and leaves (for narrow paths). If this jungle is located in Africa or south Asia, you may mix jungle tiles with bamboo forest tiles (but refrain from using bamboo in Central American jungles, as I don't recall hearing of wild bamboo in Central America, even though there is some bamboo in the jungles of the cmpn "Nyctophobia". Then, add eye-candy such as flowers, Old Stone Heads (in Central America), and maybe a quicksand pool, tar pit, or volcano.

Is this a little helpful?