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Old 29-08-2003, 04:36 AM   #1
1001 Jedi Nights
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Default re-entry?

Okay, how do I do a reentry (sp?) effect? You know, like when a space shuttle is entering the atmosphere? I also want the effect to fade away when the craft reaches a lower altitude.

Any suggestions?

Thanks in advance!
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Old 29-08-2003, 05:44 AM   #2
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Well, you might wanna try a combo of the following:

- Geometry wrapped around your entry vehicle mapped with an animated map of flames with greater transparency towards the top, aiming upwards (towards opposite entry vector direction) with keyed and re-mappedRGB values that go from blue to white, to blue again, then yellow, to arange, then reveal the flame map original colors, to a fade.

- all the while, have some sparks and small subtle "plasma" debris/pieces shooting off in the flame direction.

- What TRULY sells re-entry shots is WELL TIMED use of camera shake. That, along with a little full-scene glow, and depth of field blur.
So use that to your advantage for added realism

Good luck!
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Old 29-08-2003, 08:38 AM   #3
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lol all the cg pros speack the same...
My maya proffessor used to say: "motion blur is your friend", and the less time the effect has to be in screen the cooler it will be and the better it will stand

so: Trogdoooorrrrr!
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Old 29-08-2003, 03:51 PM   #4
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Hey ragecgi, thanks for your advice. I'm quite a newbie, so I have one additional question for you. How would I have greater transparency at the top?

The rest of that I think I can handle though, thanks for your help.

[edit]did you mean adding the transparency on the map itself? such as adding it in photoshop?
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Old 29-08-2003, 10:27 PM   #5
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Funny, I'm doing a cartoon-ish reentry as we speak.

In the transparency channel, I used the Blend Utility to Blend a stretched out noise pattern that was animated in the Offset value of the place2Dtexture node so it looks streaky, with a simple ramp so it's more transparent on one end than the other. I'll have something to post and show tonight.
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Old 30-08-2003, 05:11 AM   #6
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Just as Dann said
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Old 30-08-2003, 06:01 AM   #7
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OK, here it is. It's about 2MB so be patient.

Now that I see it rendered and composited, it needs a little work, but you get the idea. The Re-entry effect shows up on both space ships, and some of the meteoroids.

Take a look

and because I'm such a nice guy, here is my shader. Notice how it changes color over time as it would go through the atmosphere.
Attached Files
File Type: ma reentry.ma (69.2 KB, 48 views)
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Old 30-08-2003, 10:27 PM   #8
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oops, posted the wrong file version. I also switched from a Blend Utility to a Layered Texture
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File Type: ma reentry.ma (70.4 KB, 75 views)

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Old 30-08-2003, 11:40 PM   #9
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Hey, cool Dann! That is exactly what I needed to get myself on the right track.

If you don't mind, I'm going to base my shader on what I've observed on yours
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Old 31-08-2003, 02:23 AM   #10
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NOT BAD!

I had to play it again to look for the effect, but it looks like you executed it flawlessly

And since the reentry is not your main focus, there seems to be no need for dramatic plasma particles, and intense glow effects either.

Great job!
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