Making face for octagon (won't fill)


I am having a problem with filling in a face for an octagon. When I select all the vertices and press F the face won’t fill. Can anybody explain why it won’t fill and how to fill it properly.


a face is formed by either 3 or 4 verts. press shift-f (think of shift as a Super key) if you have more than that selected for a beauty fill.

You can also select 4 vertices at a time, press F… and do the same with the other 4. A lot of times this procedure makes a cleaner mesh than the beauty fill. Make sure however to always create a face, (don’t leave a hole between the two 4 vertex faces)…