This is my first time in this forum and I had not gone back into the other threads. It's okay though, I just want to follow what is being done.  As my first would tecnically be Senryu, haiku form using 5-7-5 but on human existance rather than nature. My ultimate first being in high school which I failed miserably at, infact if I remember correctly my english teacher gave me a C- I was always intimidated by them. At any rate, age renewed interest.....
The best way for me to describe Renga  is to give an excerpt of the definintion from my collection of Poetry Forms and Terminoly (if you type in this it will lead you to the site) this particular one I find most useful.

"In classical RENGA, 3-line and 2-line verses are alternated, beginning with a 3-line verse (a hokku, usually approximating 5-7-5 syllables) resembling haiku and indicating a season. A second poet composes the following verse (2 lines approximating 7-7), linking it by one of several methods (not too obviously, please) with the first. The next verse (of 3 lines), composed by the first poet (in a 2-person renga) or by another (in renga written by more than 2 poets), links with the second but not with the first.=renga,20 line verse
Traditionally, each verse employs a season word, most especially the ones requiring reference to autumn, moon, flower, etc. Season words are words usually associated with one season more than another (blossom = spring; snow = winter; baseball = summer, harvest = autumn, etc.) Verses do not refer to moon or flower except when they are specifically called for.

Beginning capitals and ending punctuation are usually avoided. These patterns continue throughout the renga, each verse linking somehow with the verse preceding it, but with no others. Each verse may launch us in a new direction, providing the next poet with a new puzzle to solve. Once a significant noun, verb, adjective or adverb occurs, it is usually not used in another verse (tho a witty switch of meaning or context might be acceptable in adjacent links). This technique keeps a renga continually twisting and turning, challenging both poet and reader.

The result is a constantly changing mosaic which discourages development of a logical, sequential narrative. The pleasures derived from continual surprise, striking imagery and delightfully sudden (and often witty) insights can be captivating. That is one of the chief delights of renga."

While we are not using traditional...we are in effect using Renga by taking the last word and incorporating it into the next....which is an answer of to the prior verse.

I scoured my site looking for haiku using a 3-5-3 rule, but couldn't find one. I mostly did this because I thought that there was something that I had missed,  which is fine because rules are meant to be broken. An exercise for the brain and spirit. But still, there should be a continual flow....one verse traditional...next. free....something on that vein. Even in Asian form free verse follows a continuity. I hope this helps.

~Michelle~