This is similar to my experience, especially the "weightlessness" part. I may have started composing with a viewing card (the most under-rated of all useful LF tools!), but when I begin working on the ground glass, the scene quickly, magically becomes geometric and abstract to me – very pleasingly so – transforming into a Cezanne-like image whose components are spheres, rectangles, triangles. That's when "upside down" and "backwards" fall away from my thinking. And if I'm enjoying a good day, these shapes harmonize with and balance each other. Geometry and abstraction can be very "weightless" indeed!
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