This is the Michael 2 suit.  In Preview mode it looks fine.  But when I render it in firefly it looks semitransparent.  Not sure it shows well in the attached pic but even the sleeves are semitransparent.   I checked the materials and there is no transparency map loaded.  All materials are set to 0% transparency.  This is Poser 7 with all updates, by the way.

Would you be able to show us a screen-capture of the material room (advanced) please?

Also, are normals set to forward?

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks

I set normals to forward as you suggested and then rendered again.  Even the pants are semitransparent

The transparency edge value is set at 1;  this will cause transparency in obliquely-viewed areas.  Set it to 0.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5

What seachnasaigh said...

...this is why I like to see the shader itself.

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks

gee if you can read that pic I need better glasses :) 

Um, I could barely make out that 1under transparency_edge... you do have a point, Mark.

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks

That was it.  Thank you very much everyone.  Only some of the bodyparts were set like that.  Don't know how they got changed.  Thanks again.