Covid_A_Swab It's a texture i made and then used a sheet (masked and transparent) to place it on top of the ground (1grid block above it)
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I've tried the bps cut into the floor (creating a floor texture with the patch on it), but it created problems not matching the floor texture and it did not center the right way.
Basically, when i do decorations, I usually use a sheet masking the texture placing it on a surface. Its quick and it creates better results imo.
You may have to play with the bright corners option, sometimes the textures will turn out underlit.