If you open the rule, and search for file paths or images, such as ".jpg", you can find the path to the textures, and match those to where your texture files are. OR, you might realize you don't have the texture files.
Is that screen shot from the CityEngine viewport? If so, it looks like you have the graph network turned on. Try turning the graph network off from the toolbar at the top and see if that removes the black lines.
Micah is correct, the points are a result of the segment network layer being turned on. You only want to show polygon models when showing street segments. Those points will appear in screen shots as well if you take them unless the segment lines are toggled off in the display.
Also judging by the number of breakpoints, your network might benefit from a simplify graph run.