Ohhhh... I checked your ideabooks and posts! I like your style! I think we have a lot in common when it comes to Houzz!

Gudday Luke, I think all fungi are totally cool. You would be surprised how many of our Australian fungi haven't been named let alone studied. They look like a variety of puffball. Are the grey ones more mature or juvenile? Anyway just enjoy their kookiness. You are providing an environment that they enjoy. All our natives support another batch of natives and are supported by yet another batch of natives. It's not a bad thing. Run with it!! :-)

Hello Michael, Did you mean to post on Australian Houzz? https://www.houzz.de/forum/diskussionen-zu-design-dilemma-dsbr0-bd~t_28654

OP, you should also consider energy efficiency & comfort. It's great that you appear to have north facing living areas (with a high proportion of glazing facing this direction). But looking at the elevation picture, it appears you may have too much glass. Overglazing can result in a home that becomes uncomfortably hot, even in winter! This is very dependent on your location & climate. Cooler climates need more exposed north facing glass, & exposed thermal mass (concrete or masonry) to absorb that solar radiation. Warmer climates require less exposed north facing glass & thermal mass, particularly hot humid climates, where exposed thermal mass can be very detrimental. In these climates it's important that northern glass is shaded, even in winter of glass areas are too high. As there's no floor plan, & you haven't mentioned your location, it's hard to tell if you've overglazed with exposed northern glass. Read the following site, & consider your glazing to floor area & glazing to mass ratios. http://yourhome.gov.au/passive-design/thermal-mass