The Traction Building has many ornamental artwork, specially on the upper floor. I hesitate to redesign this in all details, because I am actually not sure about the best technical process (2D or 3D). In the meantime, I will assemble a complete photomontage of each side of the Building without distort of a perspective view. This view can serve as a base for a final drawing.
With Illustrator clipping masks I create actually a toolkit of all architectural elements of the Building. With this elements, I could assemble flattened photorealistic views of all four elevations of the Building.