[FrostKiwi]

Texture up-scalers misunderstanding Normal directional is a pet-peeve of mine, as seen in the texture upscale example in the article [0]. The floor tiles are supposed to be the top most thing and the mortar holding the tiles together as seen in the gaps is supposed to be the bottom most thing. But it's the wrong way around. Furthermore normals generated from RGB misunderstand topology thickness. The dirt is on the tiles give the same height variation as the mortar. Basic thinks that would never happen with human authored textures.

[0] https://www.nvidia.com/en-us/geforce/comparisons/nvidia-rtx-...

[krageon]

Your top most / bottom-most thing appears to me exactly as you describe it should be (i.e. it looks like normal tiles and connective material)