The critically acclaimed film employed oil painters trained to paint like van Gogh .
In it , Roulin 's asked by his father , Joseph , to deliver a letter to Vincent 's brother , Theo van Gogh .
The critically acclaimed film employed oil painters trained to paint like Vincent   .
In it , Roulin 's asked by his father , Joseph , to deliver a letter to Vincent 's brother , Theo van Gogh .