Recognise emerging ideas
As you sketch you may have a strong idea in your head how the image should evolve. But it’s important to also be aware of ideas which might be revealed unexpectedly while sketching. This is part of the visual development design process that’s often used in the animation industry.
As I worked on the rough sketches for this surface structure I was aware that Mars only has about 38 per cent surface gravity compared to Earth, so this opens up the possibility of designing some unusual architectural ideas. I ended up with the balloon/tent idea which looked reminiscent of an Edison screw light-bulb shape, and it was this final detail that inspired the spiral access ramps at the base of the structure.