In 1958, he furthered his studies at Painting, Sculpture and Graphic arts department, Silpakorn University.
His attitude toward his work, however, had been changed since he belonged to the last generation of Silpa Bhirasri’s students at Silpakorn University.
The reason his teacher gave to him is ‘your fish have no fishy smell, your bird can’t fly through the air, your horse can’t be ridden or rushed.
The honoured cremation was bestowed by Her Royal Highness Princess Maha Chakri Sirindhorn.
Thawan earned a worldwide reputation as a Thai contemporary artist from these buddhist painting.
The unique characteristic of Thawan’s painting including not only form and religious story but also the colour he used.
While Thawan's works are powerful, focusing on the dark side or passion in the human mind.