They certainly don’t have to. There are a variety of options when it comes to fabrics and materials when choosing roller blinds. For example, you can choose to have very opaque blinds that give you maximum privacy and protection from light. Or, you can go with light filtering roller blinds that provide added privacy while still letting a controlled amount of light into your space. This way you can see out during the day, but pesky neighbours or passers-by won’t be able to see in.