I have an issue with one of my very first model attempts ever. While using the extrude tool (and sometimes deleting faces / vertices) alot, somehow additional faces have been created, take a look at this screenshot:
I’ve marked the faces in question. Now, i don’t know how i have created those faces (i guess it happened when i deleting some faces or vertices and extruded again) and i think i can delete them without problems, but how can i prevent this to happen again anyway?
Any advise for a beginner would be much appreciated.