Hoya imperialis is the most difficult Hoya to photograph well that I have had experience with.  I took a few quick shots this morning and this was the best that I could come up with.  I am going to try again over the weekend.  The problem is that the blooms are as shiny as glass and it seems that no matter what I try, I get a terrible reflection.  The plant however is oblivious to the difficulties in getting a great photo, and is once again covered with lots of peduncles with buds.