Keep in mind a white dad is as genetically distant from his Half Asian daughter as he is from a random white girl on the street.
http://www.dailymail.co.uk/news/article-5349477/Father-daughter-baby-wanted-marry.htmlthere might be some genetic problems with same-race parents being too close
But with different-race parents, the genetic distance is the same as if they were nonrelated white people. The kids wont be that closely related to the dad