yeah i'm not sure how LTDK works, but thanks for showing me your test image, it helps to arrange it , can you try this ?
11 days ago(+1)
You can try this one i removed the void parts and i also moved the walls a bit more on the middle
8 days ago(+1)
just sent a new update (v2.5) for the asset pack adding new walls tiles and hopefully making everything easier to tile , thanks for the suggestion