Can wall blocks in processor lists connect to surrounding blocks automatically?

I made a structure with 4 sides and use a processor list to replace some of the blocks with wall blocks. The wall blocks are unset in the processor, but they spawn as their pillar form (all directions are set as false), leaving nasty gaps in the sides. I cannot simply set the wall blocks to be true in various cardinal directions (ex. connect north and south) because the perpendicular direction would look strange in return (east and west). Is there a way to set the wall blocks to just connect to their surrounding blocks as they naturally would if placed by hand?