I wrote this blog post about creating a 3D model of Town Hall train station by walking around with an iPhone, and then creating a poster of a cross-section projection of it!<p>Aren’t the escalator and staircase crossovers a beautiful symmetrical pattern? I had no idea that’s how they were arranged - it's not obvious in person. I think it’s a wonderful way to visualise architecture.<p>Let me know if you have any questions - I'm definitely no Blender expert but it's good fun to use!