SketchUp’s Match Photo feature can help you apply a photo to your model, or even create a model from a photo.Match Photo works best when your image meets certain criteria:

Materials, environments, and textures add images, colors, lighting, and textures to parts of your model. Applying these effects to your models adds an extra level of detail and realism. 

With 3D Warehouse you can download materials directly into your models, or as standalone .skm files.To download a material from 3D Warehouse into a SketchUp model, follow these steps.