Director Danny Boyle helped Anurag Kashyap with the 'tripping away' scenes by introducing him to a special camera he (Boyle) had got from Holland. This let Kashyap show whats going on inside characters mind during the drug shots without actually showing drugs.
The idea of this film was suggested to Anurag Kashyap by Abhay Deol, who plays the lead role. It was once narrated to Anurag at a party by actor Abhay long before he had taken up his acting career.
There are a number of references to the film Devdas (2002) (since Dev D and Devdas (2002) are both based on Sarat Chandra Chattopadhyay's novel "Devdas"). The film Lennie/Chanda is watching in the bus and later in her room in the brothel where she chooses her name to be Chanda is Devdas (2002). Outside the hidden bar in New Delhi that Dev visits, has a poster of Shah Rukh Khan lighting a cigarette taken from Devdas (2002).
At around 59 mins Chunni calls out to Chanda to show her the bike he has purchased for her. While Chanda looks out from the Balcony, Chunni points to himself, his body language leading to my conclusion that it is for himself, while this mismatch is carefully patched by adding a dialogue ("Yes, for you") from Chunni, while the camera focuses on Chanda.
Dev calls Paro and the time shown in the movie is 11PM. Just after the call Dev goes to buy liquor but Dev is staying in Delhi and in Delhi liquor shops are closed by 10PM.
(at around 1 min) Chunni calls out to Chanda to show her the bike he has purchased for her. While Chanda looks out from the balcony, Chunni points to himself, his body language leading to my conclusion that it is for him, while this mismatch is carefully patched by adding a dialogue ("Yes, for you") from Chunni, while the camera focuses on Chanda.
No. Although, the characters are similar since, both movies are based on a novella "Devdas", by Sharat Chandra Chattopadhyay. There have been films prior to Devdas(2002) that have been made based on the novella.