The organic roof shape allows the shading to be specific to where the sun mostly hits. By being organically shaped, parts can be recessed and pulled out to get a specific effect.
What should I upload in this Develop Solutions step?
Consider uploading images (JPG, GIF) of your rough digital model. It's ok if your model is still a work in progress. Show an axonometric or perspective view with people, which will help others understand the scale of your library.