Could you please let me know what I'm doing wrong and all the textures I use in the program have a wavy/ruffle shape, if you zoom in on the image.

Development Getting Started & Setup
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1

It is easier to understand my problem if you zoom in on the exterior floor around the swimming pool.

Thanks

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2

It's probably related to this known TM issue - more information and possible work-arounds here; https://twinmotionhelp.epicgames.com/s/question/0D54z0000962f5eCAA/big-problem-with-path-tracer?language=en_US