Creating a Deep-Space Star Nebula
by Luke Ahearn

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Often the space scene in a game must be broken with some detail or feature, and a cloud nebula is a good one to use. With this effect, you can also create a cold, deep space look where our sun is but a distant light in a cloud-like galaxy.

1. Using your deluxe star field created above (last week's excerpt), create a new layer and set its mode to Screen. [an error occurred while processing this directive] 2. Make your foreground color a bright blue and the background color black.

3. Use the Round Selection tool (The Elliptical Marquee) and set the feather to 25. Select an oval shape in the middle of the image.

Figure 2.37
4. Now render some clouds; choose Filter|Render|Clouds, and then Filter|Render|Difference Clouds. If you run the Difference Clouds filter a few times, you will get several variations that begin to look very nebula-like.

5. Now choose Filter|Distort|Twirl. Settings: 700. Your image should look like Figure 2.37.


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