Hello, I'm new here.  I'm using Poser 6 and when I render at high quality, this orange dress has black spots on it at the bottom.  Is the pose too extreme or perhaps it's because I have render backfacing polys option turned off? The figure doesn't appear to be poking through.



 

Hello and welcome P4luvr

From the pics, it looks, as if the problem is caused by the Poly Smoothing option.
P4 clothing isn't designed to work with it, so on some poses the backside of the mesh is smoothed in another direction than the top layer. Try selecting the bodypart and swithcing Poly Smoothing off. If you see it renders o.k. you'll know if it was the problem. Then you can try switching it back on again and test different values.

Hope it helps

If it's a dynamic dress you've probably backfacing polygons intersecting the surface of the dress  (the supposed visible surface) try to smooth the parameters , collision offset and collision depth . If you want this result (your picture) the solution is also simpler: make two render, one like this and the other one with backfacing poly turned off, then put them on two layers and use the second one to correct the wrong part of the first one

P.S. You can even make another render with only the dress, one shoulder of Posette intersects the dress, in that way, you can use the "only dress" render to correct everything.

Hey everybody, thanks for the tips.  I discovered that the smooth polygons function was causing the problem on the front of the dress.  Even with remove backfacing polys unchecked, it is still in the back inside surface of the dress (between her legs).  I discovered that rendering at very low quality, without shadows, was the only way to get rid of all the black areas.  Using the layer technique is what I'll do to get a clean picture.

Another thing you can try is -> MatRoom -> Advanced Settings. On the material root try checking "Normals forward"
This fixes some issues, especially with older meshes and trans hair.

I had the same happen to me, on a high quality render as well.

I too reduced the quality of the render, initially.

I also played around with render settings.

Then I thought for a while (it is all about light rays), so I moved the offending light (once I figured out which one it was!), and rearranged the lighting. Also had success adjusting the offending lights properties.

I couldn't find "Normals Forward" anywhere in the material room.  Keep in mind this is the default Posette orange dress.  It is a basic orange color.  There are no extra material nodes or anything.

I'll try playing around with the lighting some to see if I can get that to work as well.

I've been testing a bit
I found a Poly smoothing crease angle value of 50 (default is 80) on the Hip of the dress works much better

 

Switching Normals forward in the mats makes any remaining stickthrough almost invisible.

 

Hope it helps

Thanks for the tip Ahjah.

Thanks ahjah, I tried changing the crease angle and it worked!  Still has the same problem on the very bottom though.  My material room looks the same as yours except it does not have Normals Forward at the bottom.  Just above that the ToonID number is different as well.  I'm not sure why.

must be one of the small differences between Poser 6 and Poser 7 (that I am running)

You are using Poser 7?  That solves that mystery.