I'm getting dark patches on some imported obj files.

In the picture, both the bodice top and long skirt are lofted in maya. Both are converted to polygons and exported.

I have tried lots of different methods of converting the skirt, rebuilding, smoothing etc, but always the same result.

Any thoughts would be great to hear.

Regards

Graeme

It is probably normals facing the wrong way. In P6 Material room you can tick the lowest box to bring normals forward. You may be able to do the same in Maya, C4D allows you to do this.

Yup, those look like reversed normals.

There are ways to fix it in Poser 5 and 6, but it would be best to make sure the normals are facing the right way before you export it to Poser.

do you have a texture map on that area? if so, try removing the texture map, and rendering it without. if you still get the wierd look, then its normals. otherwise you have run into the same problem I get of the UV coordinates going all screwy on you when importing.

Double sided polygons will also render poorly in Poser 5 or 6 (P4 is fine with them).

Thanks Guys. I'll check the normals in Maya. There is no texture map attached yet. I think I tried both checking and unchecking the reverse normals option box when importing to Poser. I'll do a bit more testing and let you know. Graeme

I got that stuff on simple flat squares... never could figure it out. Finally I just set a DISPLACEMENT value of black... value zero. The problem always seems to go away. Anybody got a better idea?

if you cant figure it out, pass the model this way, and I will run it through some polygon processes in Polytrans, aswell as try outputting it to several different formats that poser supports for you. this is what I do to most of the problem" objects I get. it fixes about 95% of them

That looks distinctly like double-sided polygons. The normals are probably all facing the right way, but due to z-buffering issues, you are seeing some of the back faces and some of the front faces. You can either: 1. get rid of all the 'inside' polygons (the ones that are facing the inside of the garment). 2. add a displacement to the material that's applied to the outside layer of the dress. 3. disable back-face rendering.

No... it is NOT caused by double sided polygons show the back faces... same problem occurs even on single-sided squares.

Uhm, ok I'm completely baffled then. It sure looks like double-sided polys to me. Could you send me a .obj file of a simple single flat polygon that shows the same problem?