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10.4 material
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Captions
Figure 1
Use the Ball tool to create a Tesselated sphere. The nebula will eventually be mapped on the
inside once the polygons are Flipped to face inwardly.
Figure 2
Positioning the camera within the nebula sphere.
Figure 3
The view from inside the nebula sphere. Note the stars (particles) in the background.
Figure 4
The key ingredient for creating the surface of a nebula is the Fractal Noise pattern for both the
Luminosity and Transparency procedural textures. The transparency texture should be at least
twice as large as the luminosity texture so that patches of nebula appear instead of one solid wall
of gas when no transparency map is used.
Figure 5
The final nebula created entirely with Fractal Noise procedurals. Three lens flares, the Star
Destroyer included with LightWave 3.1 and a custom made starfield round out the nebula scene.
Figures 6a-6c
The various stages of creating a hand-painted nebula in OpalPaint. The final panel shows the
results of Smearing the different colors into each other with additional swirling wisps.
Figure 7
The nebula image after it has been converted to greyscale and processed through the Negetive
operator in ADPro. This image will serve as a transparency map for the plane object containing
the full-color surface mapped nebula. The white areas represent full transparency, the dark
opacity.
Figure 8
Modeler's ability to display a background photo allows tracing the nebula image for an exact fit
onto a plane polygon. Note the image was scaled horizontally to fit the video resolution it was
originally created in.
Figure 9
The final layout in LightWave of all the elements in the nebula scene as shown in Figure 10. The
two angled, rectangular planes contain the hand-painted nebulas.
Figure 10
The final localized-nebula scene was rendered in Medium resolution (752x480) with medium
anti-aliasing and motion-blur added for the moving ship. Total time: approximately 25 minutes.
Figure 11
Yet another method of filling your space scene with a nebula. Simply map the nebula image onto
a curved set of polygons behind your spherical starfield. Severe panning is now possible and the
nebula will remain in view throughout the duration.
Figure 12
The result of the "Babylon 5" nebula technique. With the nebula filling most of the view, the
harsher but more accurate outer space lighting methods can be utilized because the bright
regions of the nebula provide silhouetting of the edges of the ship normally in shadow.