I'm currently working on a project where I'm modelling informal settlements in South Africa using CityEngine. I've used procedural modelling to build the structures and the last thing I did was to apply colour to the models. The colour, however, is not displaying properly - instead of a solid colour it appears patchy and in some places it doesn't show at all. I've attached a screenshot of one of the objects (set of postboxes). The roof is supposed to be red and the bottom panel is supposed to be blue. I'm having the same problem when I apply a photograph (cropped using the facade wizard) as texture to the models.