I'm trying to do as Ian Hubert does in his -now famous- blender speech at BCON19.
At 3.47, he 'import images as a planes' then extrude it. I try to do the same, but Blender doesn't react the same at all.
When I extrude my wall photo, it just gets semi transparent in a strange way, as if it was hollow. When I do an edge loop a part of the picture just disappears.
On the right the original pic, on the left the same plane that I extruded and loopcutted vertically in the middle.
What am I doing wrong? Thanks for your help.