Direction of Light
With the point of view chosen then some cleaning up of both the fungus and its immediate environment is often required.
Positioning The Camera
Once you have found an interesting fungus to photograph, the fun really starts. Some thought needs to go into how to get the best results and make use of available light.
Frame the subject to suit your end purpose. If this is for entry into a competition, then the rule of thirds comes into play, or, as in my case, for my website, then fungi are usually centred in landscape mode. If for printing, then either landscape or portrait orientation works fine.
Amanita nothofagi So often, plants, trees, large branches, rocks or similar lie between you and the fungus. You also need some room to sit and look into your view finder. Plants and leaf litter can be moved or pined back out of the way. If there are trees or rocks, then you will have no choice but to move the camera.
Sloping Ground
Podoserpula pusio var. tristisEven the slope of the ground can cause problems. I have, occasionally, found myself hanging on for dear life as I try to position myself and the tripod on a step bank. Hoping I don't lose grip and end up in a steep gully head first! On the other hand, positioning the camera down from a fungus and looking up allows you to show some of the underside of the fungus, which can be an advantage.
Cystoderma species Unfortunately, photographers are not the only ones who like fungi. It's not uncommon to find chunks missing after being eaten by insects. Or damaged by leaf litter or branches having fallen on them. Photographing them from a different direction can cover this, or simply moving on and hope to find a better specimen.
Angle of View
Amanita nothofagi
The angle at which you position the camera depends on what features you wish to show and the species being photographed.

Ground Level
Taken from ground level, it shows the shape of the fungus and any features on the stalk, and, if you are lucky, the gills. For club and coral fungi, this is usually the best, but for agarics it's not the case as there are often details in the cap that can't be seenAmanita nothofagi.
From this angle, the cap of an agaric is shown off well, but gives you very little idea as to what it is you are looking at. This angle does work well for many of the cup fungi that don't have a stalk, or the woody bracket fungi that grow from the sides of dead trees.

At An Angle
Amanita nothofagi This is the direction I chose most often for agarics showing both the cap and some of the stalk. It's still a bit of a compromise, as you are still not able to see the gills. or the top of the stalk.
Two Sides
Favolaschia pustulosa Keep in mind that fungi have two sides. If one side looks a little boring, then check out the other. Trying to get the camera underneath can be a problem. If you are lucky, it might be on wood, which can be turned over, otherwise try using a mirror.
Getting Closer
Ramaria rubripermanens Don't be shy about moving in close to show fine details or interesting patterns or colours. This can also help with showing fine details needed for identifying the fungus.