Textures slightly offset under wall blocks

Some more information concerning the bug:

The Bug:

There is z-fighting on the underside of the wall model due to the extra segment which appears when the wall is next to a block.

Steps to Reproduce:

• Obtain a wall and block.

• Place the wall next to the block, floating in the air so you can see the underside of the wall.

• Fly right up against the underside of the wall and move your camera slightly back and forth.

• Observe the edges of the pixels.

Observed Behavior:

There is slight z-fighting due to the overlapping of the wall extension and the main body.

Expected Behavior:

There would be no z-fighting. This could be achieved making the "extension" shorter, so it doesn't extend into the main body. 

Do the associated template model files contain any non-integer values for elements that may cause this?

There would be no z-fighting. This could be achieved making the "extension" shorter, so it doesn't extend into the main body.

Except for the fact that the pillar (up) can be turned off if the opposite side also has a connection, then it shouldn't have a hole in the model.