Hi, thanks for the reply.

I've been using morphs and magnets since they were introduced to Poser. Zero pose, zero morphs, clothing fits just fine. I'll use RMTH Lara for V4 as an example. Using the exact same morphs that she uses on the V4Bodysuit again works fine until she's posed. (btw this isn't just happening on the Lara character) then the elbows poke through the suit. I've tried using custom morphs with magnets, reducing the scale of the elbow. Nothing seems to work. This isn't a problem if the suit isn't transparent or the suit is sleeveless but that then limits me. No matter what character set I use, the elbows ALWAYS stick through as soon as she's posed. I had nowhere near this amount of problem with V3.

I must admit I haven't played with the JCM's much so I'll give that a go later.

I appreciate that the 2 models have different geom and am well aware that the clothing from one wont fit another. I have loads of V3 clothes and props and I'm starting to build a library of stuff for V4 too.

I'm not sure you really understand what I'm asking here... But that's most probably down to me explaining things incorrectly.

I know maps for V4 will not load on V3, I also have no issue with the lighting I'm using or render settings. I have some fantastic renders of V4 and using the skin from the Eden character her skin looks more real and alive than the V3 models I'm using. I'm pretty sure that this is due to the nodes and connections used within the advanced tab in the material room. I'd like to know if this is because of shaders and if shaders can be applied to V3 in the same manor.

I've followed the link you supplied but found quite a few of the tutorials to be missing or no longer available. If I can understand the term behind the more lifelike skin I should be able to search for a tutorial a lot easier.

I do appreciate your time in answering my question, I just don't think I explained myself very well. 

I'm at work right now. I might be able to explain things a bit better with some images when I get home.