question: static public ItemStack chiselBlock ( final IContinuousInventory selected , final ActingPlayer player , final VoxelBlob vb , final World world , final BlockPos pos , final EnumFacing side , final int x , final int y , final int z , ItemStack output , final List < EntityItem > spawnlist ) { final boolean isCreative = player . isCreative ( ) ; final int blk = vb . get ( x , y , z ) ; if ( blk == 0 ) { return output ; } if ( ! canMine ( selected , Block . getStateById ( blk ) , player . getPlayer ( ) , world , pos ) ) { return output ; } selected . useItem ( blk ) ; final boolean spawnBit = ChiselsAndBits . getItems ( ) . itemBlockBit != null ; if ( ! world . isRemote && ! isCreative ) { double hitX = x * one_16th ; double hitY = y * one_16th ; double hitZ = z * one_16th ; final double offset = 0.5 ; hitX += side . getFrontOffsetX ( ) * offset ; hitY += side . getFrontOffsetY ( ) * offset ; hitZ += side . getFrontOffsetZ ( ) * offset ; if ( output == null || ! ItemChiseledBit . sameBit ( output , blk ) || output . stackSize == 64 ) { output = ItemChiseledBit . createStack ( blk , 1 , true ) ; if ( spawnBit ) { spawnlist . add ( new EntityItem ( world , pos . getX ( ) + hitX , pos . getY ( ) + hitY , pos . getZ ( ) + hitZ , output ) ) ; } } else { output . stackSize ++ ; } } else { output = ItemChiseledBit . createStack ( blk , 1 , true ) ; } vb . clear ( x , y , z ) ; return output ; }
target:  Modifies VoxelData of TileEntityChiseled