Ok so not certain if this is the right place or not but I'm sure someone will tell me if I am wrong.

I spent the last hour searching the internet to no avail. I am looking for a definitive tutorial on crating content for poser and what the workflow should be. I've seen some references to it but nothing substantial.

if there are any vendors reading this, where did you start and how?

I use blender and can model already, just need to know the process after that in order to get my models to market.

Any links you can provide would be greatly appreciated.

Here is some good places to start:

S1M Developer Resource and Video Tutorial

If you are using V4:

Make it Easy

You can also do a Marketplace search for merchant resources. I hope these help.

Think i started much like you did with some knowledge of making some 3D, then I did some trial an error tests in getting things into Poser. But here is a quick guide for you, but basically, I think the best you can do is simply try it and expect that the first product might take a while to get working as it is suppose to, until you get experience in how to start up a product.

The easiest way to get started is if you start by making static objects (Chairs, tables etc.) meaning where no rigging is involved. Then its pretty straight forward as Poser can import varies formats such as obj files etc. so you can import them to poser as you would any other 3d app. which would be step 1.

Step 2 is to get all the materials added in Poser, so you apply all the textures you made, think this is where most problems can occur if you are new.

Step 3 You have to make sure that the file fits the file structure that Poser needs. The easiest here i think, is to simply copy/paste one of the existing runtime folders to a new location on your harddisk and then you delete all content from it, but leave all the folders. Once that is done you add the new runtime to Poser. And whenever you are done with an object you add it to that runtime library, that way when your product is finished you know that everything is in the correct place, otherwise you might run into problems with wrong path to textures and obj files etc. Which will require you to spend time fixing that.

Step 4 Then you read through the selling product guidelines found here on renderosity (Cant remember exactly what its called) and fill out all the required steps for making a new product, after that it will go through a review where you might (in most cases) get some feedback on varies things that might be missing, wrong price etc. When you have sorted that out it will be available on the marketplace.

If you get step 1 to 3 working, then step 4 is pretty much just following a checklist of requirements.