A friend of mine told me about this model and I offered to modify it so that the gills could be printed as part of the mushroom instead of being painted (or digitally textured) on as they were in the original. Beware of the file size, though. I needed a lot of faces to capture the detail.
The author remixed this model.
The original was a smooth model with details and texture painted onto the surface. I chose to sculpt the gills of the mushroom into the model so that they could be printed with comparable detail (my sculpting was done against different reference material).