tkbd, thanks for join to us. 
![[Image: bridge-1_zpsb54cfd6c.png]](http://i1330.photobucket.com/albums/w578/Micheus/Wings3D%20-%20Forum%20III/bridge-1_zpsb54cfd6c.png)
So, I need more details about it.

(11-16-2016, 11:16 AM)tkbd Wrote: But in some cases,it occurd error.I can reproduce the error for the 2nd and 3rd cube. For the 1st one I couldn't:
[URL=http://s1298.photobucket.com/user/tukubado/media/Wings3D%20etc/bridge_rmb_tunnel_zpsm7vkur1x.png.html][/URL
![[Image: bridge-1_zpsb54cfd6c.png]](http://i1330.photobucket.com/albums/w578/Micheus/Wings3D%20-%20Forum%20III/bridge-1_zpsb54cfd6c.png)
So, I need more details about it.