Strange geometry showing on model only in rendered view

[wilmagness]

Basically, I’ve modeled a human head and all seems well except for in one place, one of the faces did not show up in the solid, textured, or render display.

DETAILS: Modeled half the head with a mirror modifier that is filling in the other half. There is also a subsurf modifier that is smoothing everything out except for that lower lip!

I’m very new to blender, so I checked online and found that it was a normals problem, I flipped the normal and it looked good. Until I changed to render display, where the strange angular geometry can be seen.

I screencapped the whole screen in case there is valuable info that I don’t know I should tell you. Those images are attached.

Thanks in advance for any info you can provide!

[Modron]

it looks likes it’s set to solid shading instead of smooth on those faces. there’s a button to make it smooth over on the tool shelf on the left. but it also looks like there might be some z-fighting, indicating the presence of doubles, which can be fixed with ‘remove doubles’ also on the tool shelf. also your topology could be improved a bit. now that you have a basic head shape, you could create a new mesh over it, with optimal topology, using the retopo / surface snapping tools.
(edit) also, it looks like you have some n-gons ( faces with more than four edges ) which will lead to bad subsurfacing, and make it impossible to animate properly. it’s best to avoid those.