Princess Kate has been defended as the retouching of royal photos was labelled “part of the creative process” by the curator of a new exhibition. Alessandro Nasini, the curator behind an exhibition at Buckingham Palace celebrating 100 years of royal photographs, said retouching remains a vital tool in royal portrait photography. Retouching is a photography tool which can vary from cropping an image to removing backgrounds. Nasini has defended the practice of retouching images despite controversy over a Mother’s Day photo taken by Prince William earlier this year. Many of the photos on display …