Lighting, Texture, Colour Theory, Psychology
Transparency, Character, Experience
Organisms respond to both their external circumstances and inner constitution. 'In nature all forms are a creation of necessity.' The structural form, geometry and proportion of an architectural project are conditioned by the specific circumstances of the site and choice of materials. Natural organisms evolve and so can architectural, interior and spatial design styles.
It depends on the purpose and the response it creates. Form follows function. Features of a structural form may not be necessary for construction, convenience or propriety but for other reasons. Ornament is now seen as a secondary element in design, not integral to it, however it can contribute to its 'value'.