For interior design, light plays an important role in creating a particular ambient. Although light can be artificial, natural light provides a health benefit to the inhabitants of the designed space and can also be used as an energy-saving strategy. Research is important. Windows are relevant not only from a designer’s perspective but also from a constructor’s perspective. Windows and steel are not particularly good insulators although the design looks good. Therefore, the designer needs to know more about the type of glass he or she can use, to achieve an aesthetically pleasing design but also to guarantee that the space will not be too cold especially in winter seasons. The visualisation process of the different types of windows has helped substantially in imagining how different types of windows would fit into several distinctive designs. From the sketches made during the lecture by Charles Prior it can be observed that some models would match more classic interiors while others are more futuristic. From this lecture I have learned the multiple uses of windows in interior designs and the importance of keeping their design within functionality boundaries.