michaelrowe01's post in Shower Tile was marked as the answer
I am running Home Designer Architectural 2021, and had spent hours on the site trying to figure it out. Hence I came up with the texture and material above. The texture, while you can't see it in the picture, because it is representing grout that is a close color match to the the tile pattern. The Material below it is the actual tile, I have tried another that that is rotated to Vertical, but am still getting the same results. But I did just find this video thanks to another post (