2D 動畫作品常可以發現變形之表現手法，學術研究較少關注於變形過程的分 析，因此本研究探討2D 動畫創作之變形是如何進行？畫面的轉換運用之變形技巧、 方法和脈絡的演變，進而整理歸納出一套可參考之規則。
本研究探討早期傳統手繪動畫之「自變」與「變形帶入轉場」手法。根據個案之變形手法，運用於《3×7=28》之動畫創作，發現動畫變形過程可以用昆蟲的蛻變行為「完全變態」與「不完全變態」做詮釋，且變形過程中使用「補間」手法，可預期變形效果。動畫的視覺變形具多樣化，只要善用變形之元素在空間上視角的改變、以及物體的變形，可提升動畫之視覺豐富度。

From 2D animations, we know that various types of visual metamorphosis exist. However, this has seldom been studied in scholarly research; therefore, we investigated various cases to determine the required skills for performing 2D-animation metamorphosis. Furthermore, we summarized the metamorphosis techniques, methods, and development processes.
We analyzed six 2D-animation short films that demonstrate the metamorphosis technique and investigated the cases from two perspectives: “self-metamorphosis” and “transition through metamorphosis.” From these analysis, we used the rules to create a 2D-animation, titled “3×7=28.” We found metamorphosis in 2D animation can be interpreted "complete metamorphosis" and "incomplete metamorphosis" of transformation of insects. We can predict the effects by using the skill “in between”.