This is an animation I have made using Blender and GIMP showing true camera rotation (left) versus camera shearing (right) used to "fake" rotation e.g. in raycasting engines. I have used model and textures that I have created completely myself so this is not a derivative work of any other work.
<a href="//commons.wikimedia.org/wiki/User:Drummyfish" title="User:Drummyfish">Drummyfish</a>
<span class="int-own-work" lang="en">Own work</span>