I need to do some terrain macro work with precise projection fitting  to a game scene which is not exportable back into regular 3d formats from our game editor.   Just no such option.      I know people have been using Ninja Ripper for such things for ages   but it makes a total mess  for me  that takes hours to clean, especially material wise and it also seems like hanging both  my 3d max and Blender .  
     Anything fresh, easier to work  and new lately, preferably open source  besides that Ninja ripper or it's still only option ?    
 
            
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does he want the exported format or whats sitting in the gpu... ? which in most cases is a per material vertex buffer of a set stride and face index triplet buffer which defines the topology. Though this may explain "the mess" as "the need for speed" gpu format is not really a good editing format.... lots and lots of seams