These are actors for whom physical artefacts and even human bodies are 'mashable', contiguous and combinable with the aforementioned forms of geomedia.

Meridian is a construct akin to a Dyson sphere: a vast, hollow shell encompassing a power source that provides heat and light to lush green biomes in the interior.

The goaltender made a great save.

If a hengeyokai fails to concentrate (or perhaps gets distracted -- due to being beaten, seeing a mouse, fatigue), the human form's ears may get pointed or a tail may appear.