Super Mario 2D. Questions.

Hi,


. I am creating Mario Clone for learning. It won't be for commercial usage. It's only for learning how to create platformer games.



You will understand my problem if you will see the picture below (you will see vertical lines):


Please help.

Thanks!



I didn't find the right solution from the Internet.



References:
 forum.unity.com/threads/super-mario-2d-questions.347221/




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