i mean that i think that polygons have to consist of 3 corners!? after deleting edges and points i have polygons with several corners! isn`t it a problem?
in addition to that i think that i have to add divisions so that i will get a good result after rendering. but i do not know how and how often i have to add divisions to get a good result.
i am sorry about my questions, but as said i am a newbie.

greeeez