First, I created a clipping path around the mushroom cap and a little under using the "pen" tool in Photoshop.
I then adjusted the levels WAY to the left, making the mushroom lighter. Then I adjusted curves in an "S" shape, giving the mushroom cap an HDR look.
I then warmed up the photo a bit by adjusting the color balance to more yellow and red.
In "Selective Colors" I raised the "black" in yellow, red, and white and decreased the "black" in green (this was done to the entire photo, not just the clipping path selection).
Then I sharpened the image using "Unsharp mask" to 50%, then despeckled the "noise."
Clear as mud? I'm not very good at saying what I did, but am learning by reading other peoples' descriptions here.
Thanks for teaching me so much DPS!
pkd14u