How is the fire  effect attained using lights for jet planes or spaceship engines?

 I'll typically use an object with the Alpha value set at 100. Then I assign a glow color to it.

Hello mark. I like answers like that: unnecessary to print the post. I'll try immediately, unless I don't need de fire strength of mhscspo, I just re-modelized a candel. Thanks, can't wait for you C6 tut announced by your post-footer. sincerely, LocusSolus.   

Thank You

Doesn't the fire object from the assemble mode actually make some light?

I find that it looks neat by turning it sideways and setting its container to cylindrical, set the tip color to a dark blue/violet color and the base color to a whitish cyan - makes a cool afterburner. There's more adjustments to it, but those all depend on the look you're going for.

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Barbequed Pixels?

Your friendly neighborhood Wings3D nut.
Also feel free to browse my freebies at ShareCG.
There might be something worth downloading.

 The fire object actually gives no light. You have to add it. ;-)