The challenge with this Photoshop visualisation rendering was to clean up the building. With Photoshop visualisation, a good photograph in combination with quality subject matter will save a lot of time. To clean up the building I desaturated the substrate and then selected the darker staining with colour select. This selection was then manipulated with the levels tool to remove the darker staining. Touch ups were then completed with the clone stamp and content aware fill. I will always clean up the original image before proceeding with changing the colours.