Flips the positions of the selected UV shells either horizontally or vertically.
         
         
          
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                     Set the direction to flip the UVs of the selected shells:  or . The default is .
                      
 
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                     Set  as required to flip the UV shells in global UV space in the 0 to 1 texture space axis. Select to flip the UVs within the bounding box of the selected shells. The default is .