Very Easy!! How To Draw 3D Floating Letter

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Today's video is 「Very Easy!! How To Drawing 3D Floating Letter "F" - Anamorphic Illusion - 3D Trick Art on paper」
In response to many request, I challenged it.
※I am sorry.
I'm not so good at English, so my english sentence might be wrong.
Please forgive me because I am studying English more.