Summon a door, eg. turn around and expect a normal door to be there. Then imagine whatever you want to be on the other side. It helps to visualize in real life before you actually do it in a dream.

Waternight's got the right idea, but closing your eyes is a surefire way of ending the dream. I wouldn't recommend it.

Quote Originally Posted by whitemagician91 View Post
oh, another question, Does any one try this method?: look at a picture in the wall and try to penetrate into the picture like I saw on some films. Is it possible in a LD?
It's definitely possible; you can also look in a mirror and see an image on the other side, then try going through it. Make sure the picture or mirror is big enough, though. I've done this a few times and ended up summoning mirrors barely two or three feet across; I had to crawl through! That ruined the effect.