This is great Christian, thank you for your patience. I knew that I had to 
change the context and tried several things but with no luck. 

    
      


    Ok, so you get all the vertices ids on the the polys of the object (arrays 
of ids per poly) then get the weightmap scalar values (per point) witch you 
"pack" into an Array per object. Then you find  witch scalar values (from the 
weight map) belong to each vertices with the Find in Array node, here the 
context is Array per polygon and what we need is scalar or integer per poly so 
you used Get Array Average for that.... Am i right? Just want to be sure that I 
understand this.

    —
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On Wed, Sep 4, 2013 at 5:00 PM, Christian Gotzinger <[email protected]>
wrote:

> It's all about getting the right context. Weight maps are scalar values per
> point. The compound requires a boolean per polygon. I've attached an
> example of how you can do it (and added every node's ouput context as text
> into the image). I recommend visualizing every single pipe one after
> another so you can see what happens.[image: Inline image 1]

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