[heading]10.6. Adding Localized Bump and Reflective Characteristics[/heading]
Now we are going to finish up a few details to the cityscape behind the car. We will add localized bump and reflective details to the buildings as well as the setting between the buildings.
Step 1: Turn off the visual aspect of the car temporarily to have less distraction on the city (Figure 10.42).
Step 2: Just as you did in Figure 10.38 you are going to find the surface in the 3D Materials panel for the tallest building in the rear (GraphicMaterial_10). Again, you can use the Select Material Tool to select it directly on canvas; once selected, load the file “build reflective map.jpg” into its Reflection map (Figure 10.43).
This image is the B&W version of the original color image. The window regions were selected with the Polygonal Selections Tool and filled with white on a separate layer. The background layer was then filled with black. This ensures that only the windows will have reflective properties.
Step 3: We will create the bump map in a similar way. Figure 10.44 is a B&W version of the color map. Just like the reflective map, the white areas will rise to display peaks and the black areas have no effect. Now, load “building 2 bump map.jpg” into the Bump map of GraphicMaterial_10.
In our 3D Scene panel (Window > 3D) access the Quality drop-down menu and select Ray Traced Final to see the results. You will initially see a square grid pattern moving across our image. This is simply making several passes to improve the render by minimizing noise. You should now see the reflections from the surfaces of the neighboring building only within the glass windows as a result of the reflection map. Also, the white colored supports appear to rise forward, which is the white colors in that region of the bump map (Figure 10.45).
Step 4: Now do the exactly same thing to the building in the foreground for “GraphicMaterial_8” and use “building_reflect 1.jpg” for the reflection map and “building 1 bump map.jpg” for the bump. Adjust the intensity sliders to your liking. You should have something similar to Figure 10.46. Finally, to add some last minute feature that will hold our interest between the foreground and the background, place the “sunset.jpg” below the City layer and position it so that the sun is positioned between the buildings (Figure 10.46).