I am posting both in the Shade forum and here, but will emphasise different issues with my first Dynamic Cloth Shirt for James.  I followed the tutorial on the e-Frontier website.

1.  Why it this result happening ?  (see render)

I am using Firefly renderer, one level before Final Quality, with back-facing polygons removed.

NEXT QUESTION:

2.  (While running the cloth similuation, I tested the cloth using various free cloth presets available from PhilC dot Net website).

How do I improve the mesh to that when in final posed position, the simulation does not collide with the body ?  I already selected those parts for the mesh to collide against.  I don't understand why it still pushes into the figure. (see render)

 (I am using Hmann's shader for the second test render)

Thanks for any helpful advice.

Did you export from Shade as "Single Sided" ?
The first render suggests that you didn't.

That weird bend could be caused by it colliding with itself or some other body part. I also reccommend that you turn off collission on those weird Poser 6 specific new bits called centerofmass and goalcenterofmass.

Many thanks for the tips, All.

I revisited my Shade file, and did the single-sided OBJ exported.  It worked for the open jacket, which is now a happy poser Dynamic Cloth, except, it renders all black.

I re-did the baggy sexy shirt as a single-sided OBJ export.  It still has those awful patterns on it when I work it as a Dynamic Cloth in Poser 6.  I can't figure what else is wrong. (Remove Backfacing Polygons option has been selected in Firefly render here)

When you import the open shirt try clicking the reverse normals option and see if that fixes it. They might have exported from shade on the inside of the figure.

In the Material Room, check the "normals_forward" checkbox of the Object's material. Also, when importing it, make sure you check "Make polygon normals consistent".

Many thanks once again for all the helpful comments. 

After more re-working, I have managed to get a reasonably decent first Dynamic Cloth made by myself !  Heh heh !

What I did is somewhat mundane and technical, not artistic, as far as improvements go, and I have recorded those results in the Shade forum thread:

http://market.renderosity.com/mod/forumpro/showthread.php?thread_id=2648996

You may also see a render of the final version of the baggy shirt dynamic cloth.

Glad to see you finally got that all working. Looks good for a first try.