Rigging items together

[Anonymous]

Hi,

I have a model I am trying to make but cant seem to get to work.

The model consists of a human torso and arms.

I require the torso and arms to be separate groups but rigged together.

I've tried grouping them together and then converting the group to skin modifier and rigging that way, however gaps appear where the arms and torso meet?!

I have positioned them as close and in line as I possibly can on my computer and still holes appear.

Any help is greatly appreciated!

Many thanks,

Ed

[Anonymous]

According to what I understood you are making a character model and you want torso and arms to be separated objects, and you don't want the seam line to open and show a gap (when they both meet) 

I suppose that the problem occur during Rigging that you do not adjust the same weight for both vertices, the best method is to use direct input 

go to subobj level envelop > select Vertices (check) in parameters tab > then open weight tool > Select the vertices at the intersection (seam line) > then adjust the same weight for each vertex from two sides, repeat that for each bone affecting 

in other words you need both vertex from torso and arm to have same weight according to each bone affecting, if they have same weight to all bones that control them then they will move with the same displacement when moved. 

i made basic small example i hope it demonstrates the idea you find it attached.

I hope this worked for you and solved your problem, and if not try to make them one object if that would solve easier issue. 

[Anonymous]

Please note that you do not have to put same weight to all vertices at two sides, you just need the two OVERLAPPING  vertices to have the same value to the affecting bones. and the upcoming image shows you what i mean 

and you can adjust the weights for the other vertices around the shoulder to have different values but keep each two overlapping vertices have same weight values 

I hope this worked for you and solved it.

[Anonymous]

Thanks for the reply. This would work if the vertices overlapped exactly and in my model they are ever so slightly out and I am unable to get them aligned 

[Anonymous]

I think this would be a small problem, if you have same mesh in both sides and same number of vertices you can align then easily using the snap 

Activate 3dSnap > right click on it make sure its only vertex 
Then check the axis constrain to be off ( hotkey Alt + F3 ) 

you can check toolbar ( you can show it by customize>UI>show floating toolbars )

now you can move any vertex to snap to any vertex in the three dimensions easily.