10-13-2014, 06:40 PM
Hi Ray, welcome to the our community. 
I don't think that is a Wings3d bug. Sometimes you can get these artefacts when the inner and outer faces are too close, but it's not your case.
I download the model your shared (the .obj) and imported it into Wings3d. So, just by hitting TAB key (View->Work mode off) I couldn't see any problem. I also rendered it with POV-Ray and Kerkythea without subdivide the mesh during export and I also couldn't verify that problem.
In the picture bellow: 1st is your model I load into GLC Player; 2nd and 3rd imported into Wings3d; 4th POV-Ray render; 5th Kerkythea render; and 6th is the .obj exported from Wings3d and load again into GLC Playier.
![[Image: MedidorMedico_zps90835812.jpg]](http://i1330.photobucket.com/albums/w578/Micheus/Wings3D%20-%20Forum/MedidorMedico_zps90835812.jpg)
So, that means there is something wrong with your .obj file that is "fixed" after imported and exported back to .obj from Wings3d (I used 1.5.3).
Just in case you want to check it I attached it here.

I don't think that is a Wings3d bug. Sometimes you can get these artefacts when the inner and outer faces are too close, but it's not your case.
I download the model your shared (the .obj) and imported it into Wings3d. So, just by hitting TAB key (View->Work mode off) I couldn't see any problem. I also rendered it with POV-Ray and Kerkythea without subdivide the mesh during export and I also couldn't verify that problem.
In the picture bellow: 1st is your model I load into GLC Player; 2nd and 3rd imported into Wings3d; 4th POV-Ray render; 5th Kerkythea render; and 6th is the .obj exported from Wings3d and load again into GLC Playier.
![[Image: MedidorMedico_zps90835812.jpg]](http://i1330.photobucket.com/albums/w578/Micheus/Wings3D%20-%20Forum/MedidorMedico_zps90835812.jpg)
So, that means there is something wrong with your .obj file that is "fixed" after imported and exported back to .obj from Wings3d (I used 1.5.3).
Just in case you want to check it I attached it here.