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.

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

Thanks

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