When it is time to fruit a fungal culture, it is necessary that you control the amount of light, oxygen and humidity it receives. Changes in light, moisture and fresh air are what stimulate the mycelial mass to produce what we know as mushrooms. Each species has different requirements. Variation in these factors can control the shape of the fruit bodies. For example the CO2 levels will influence whether Reishi and Artists’ Conk mushrooms take their shelf-like, or “antler”, forms.
A Fruiting Chamber should allow you to do this, hopefully without damaging the surrounding building. In the past I have used a plastic germination tent on a plastic tarp. It was hard to clean, leaked condensation and was vulnerable to pests, like fungus gnats. After a bathroom renovation, I salvaged this shower stall to make a chamber that I hope will solve some of those problems. I will post an update when I have some fungi to fruit.