After the rethink of the lighting to make the sporangium more out standing,I have re-do the lighting and also slow down the spin of the background from 720 degree to 360 degree.
As the colours of the background and the sporangium are quite similar, I am changing the transparent sporangium to another colour.
I have chosen the blue for the transparent sporangium and push the glowing, also I have put a direction lighting behind the sporangium to light up the front and the back edges of the sporangium.
This is my final result as this stage. Welcome for comment.