After playing a ghost in his last release "Bhootnath", megastar Amitabh Bachchan will be seen as a "genie" in his forthcoming film "Aladin".

"My role is that of a genie and I will appear at the rub of the lamp to fulfill three wishes of the one that carries the object of desire," the Big B wrote on his blog.

"Aladin" is directed by Sujoy Ghosh and stars Ritesh Deshmukh and Sanjay Dutt apart from Bachchan.

The actor said that the story is contemporary but set in a fantasy world of make belief. The dresses are modern but the surroundings and the settings,larger than life and imagined.

Bachchan,who has posted some still pictures from the film's shooting lauded the film's technical aspect.

Explaining the green backdrop with little red marks on the still photographs, the actor said these are where digitally images will be filled in later.

Green backdrops are used when greater depth or volume is required and when they cannot be physically built. So,a mimimal construction is set up, actors act around it and imagine that there is a lot more to it, said the actor.

Speaking about the photograph of the genie atop a snow mountain, Bachchan said there is lot of blue that surrounds the image. This is all cloth where digitally snowy peaks and a large mountain will be filled in.

"You will never know the difference. Now you would because you have been told about it. But,in general it is seldom noticed," he added.

He said actors are getting used to this common phenomenon.

"Most of us in such extenuating circumstances are made to imagine an invisble presence like a character,a large beast, flowing rivers. A bit impersonal and not quite the required environment when emoting a scene,but that is the future," the actor wrote.

Bachchan said, "We often jokingly request the digital supervisor to replace us with our image and carry on the work so that we could remain at home. But,recently the joke turned on us.

There is a process in the making where the artist will be required to merely come in for a few minutes and do some basic movements of his body. Science would then be able to construct an image of the actor and the actor need not come on the sets again."

He said the world is moving into a difficult and interesting era. Ever since man stepped on to the moon there has been very little written about its romance in film songs and scripts.

"The moon was an integral part of our films in 40s and 50s. Science removed it. Would that happen to humans too. With DNA and cloning being vociferously discussed at international forums,would we see several of our samples moving around us,"the actor wondered.