Can you imagine a world of your own into existence?

Writers of all kinds (poets, screenwriters, novelists, etc) do this for a living.

The idea that thoughts (imagined events) can become 'physical' is a staple premise for science-fiction stories, and also features strongly in the 'fantasy' category of fiction.

The people involved in the creation of movies are often very motivated by the notion that they are making an imaginary world 'come alive'.

The perceived world would only exist in the individuals mind, therefore it would exist, but since we are limited creatures and can't actually create something tangible, I would question the sanity of the person. Also the definition of "world" would need to be established.

Mental Health is an interesting category for the questions. Good job Yahoo.

Yes. Only if you're considered crazy. People do it often when writing books though.

It can be done in lucid dreaming, and therefore by people who are highly suggestible, and knowledgeable about autosuggestion / self hypnosis.

View my comprehensive previous answer about autosuggestion / self hypnosis at http://au.answers.yahoo.com/question/index?qid=201... and my answer about lucid dreaming at http://au.answers.yahoo.com/question/index?qid=201...

Much would depend on your inherent abilities, and application, but either or both may be worth trying.

Yes. Many people do and I would think that anyone could. However, I do also believe that it would require a complete mental break from THIS reality.

You should consult with your respective mental specialist doctor who can understand the problem and give you better advice.

no