im not sure if its my graphics card or what but when I have triangles on an untextured mesh it makes single triangles stand out for no reason... does anyone know how to solve this or what is happening? it is an incomplete and untextured truck model but that doesnt matter.

do you see the darkened triangle on the place where the back window of the truck should be? thats my problem because a lot of the triangles do that from different angles and it really looks bad

do you see the darkened triangle on the place where the back window of the truck should be? thats my problem because a lot of the triangles do that from different angles and it really looks bad