This shows itself as a thick but loose and shaggy orange or orange-brown mat on wood. As an analogy, think of thick, orange shag-pile carpet. The fungal mat is a sterile, asexual state produced by species of Coprinellus. Sometimes you will see Coprinellus mushrooms growing from the mat.
In days gone by Ozonium appeared as a separate genus name.
Look-alikes
Various fungi produce mycelial growth that is brownish-orange, but not as such a thick, loose and shaggy mat.
Coprinellus (Ozonium state) is listed in the following regions:
Canberra & Southern Tablelands