This is a really famous animation film technique done by one insane studio years and years ago in Germany, only a few films, because of how hard they were to make. Each and every frame of these movies are oil paintings on glass
Inspiring art and Reminds me of the polar express in the Summer! And the Bach's who so kindly gifted caroline Walker Andrew and I! by Japanese illustrator Ryo Takemasa. He is known for depicting mountains, lakes and fields.