Hey John, you sure get a lot of cool fungi down under. Great colors and focus. The tops look a little grainy from the highlights. I shoot shrooms with natural light and will set my diffusser directly overhead to help with strong highlights on top. Sometimes I do shoot with the highlights if I'm looking for that effect.
A good composition and beautiful colours from the fungi king! You have done this fine specimen justice, John, and the highlights do not worry me . . . although it would have been interesting to see a comparative image based on Mike's suggestions.