While corner windows are fantastic for views they often cause problems depending on how they meet in the corner. This setting allows enough space for panels to hang on the sides and in the centre, but they do not appear to be fully closing.
Roman shades are a good alternative in corner windows if there is enough room for the shades to meet in the corner. An inside mount would alleviate that problem.
If privacy isn't an issue you can keep is simple with a mock roman valance that runs the width of the two windows.
Two different style windows in same room
When you have two different style windows in a room one solution is to put a roman shade on the smallest one. You can use the same fabric to coordinate the look.
If you have a layered treatment on the large window you can use the interior solution (blind, roman shade etc. ) on the smaller window.
High, small basement windows
When a window is set high in a wall it is difficult to know what to do with it. My approach is to blend it into the wall rather than make it an accent. That means keeping what you add as a treatment close in colour and value to the walls. One of the simplest solutions is to use small tension rods and make a fitted curtain from translucent material . In that way they can stay in place and still create some privacy. Another option is faux wood blinds or sheer weave roller blinds that stay down.
Shutters always work well in a basement because they can be easily opened and closed on a hinge which allows you to fold them back on the wall when you want optimum light.
Placing a bed below a basement window and then framing both with side panels pulls a design together. Keeping the window treatment and the bed the same colour adds to the cohesiveness.
Window film is a practical solution when privacy is an issue in window treatments. Some have patterns others are matte. When you buy large sheets of matte film it can be cut to create various geometric designs which add a little creativity to the solution. This pattern is by Emma Jeffs.
Cary Bernstein Architect
One of my favourite window treatments for bathrooms and kitchens is a roller shade. They have a clean, no nonsense look, are easy to raise up and down and come in a wide variety of patterns, textures and colours. If you want to see the view in the daytime they roll up completely under the cassette/valance.