How Can Curtains Improve the Look of Floor-to-Ceiling Windows?

Our flat has floor-to-ceiling windows, and the bare glass gets harsh by afternoon. What actually works here? What I've gathered so far: hang the track at ceiling level so the curtain runs full height, use a sheer for daytime and a lined panel for privacy, and pick a heavier fabric so the long drop hangs straight. Light fabrics tend to ripple. Wave folds look neat across wide glass. At an upholstery shop in Gurgaon, the most useful thing was seeing a full-length sample, not a small swatch. Kingdom of Curtains does home measurement and samples across Delhi NCR if you want a reference. Has anyone tried motorised tracks?