A 3-dimensional ambigram of the letters A, B and C.  The form in the middle will appear to read each letter separately when viewed from different angles, in the style of the cover for <a href="https://en.wikipedia.org/wiki/G%C3%B6del,_Escher,_Bach" class="extiw" title="w:Gödel, Escher, Bach">w:Gödel, Escher, Bach</a>.
<a href="https://en.wikipedia.org/wiki/User:Entirety" class="extiw" title="en:User:Entirety">en:User:Entirety</a>
<span class="int-own-work" lang="en">Own work</span>