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daniel_i_l

nuclear explosion render

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Watch this. It seems to be a cgi nuclear simulation that shows all the parts that make up a nuclear explosion, and should give you some ideas.

As to your image, it would be better if you showed an animation, so we can see the progression of the effect. Also the vertical plume appears to be in front of the lower dust cloud.

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You need to render the fire particles additively, e.g. with a GL_ONE, GL_ONE blend function.

You should also sort the particles by depth and render back-to-front.

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Quote:
Original post by benjamin bunny
You need to render the fire particles additively, e.g. with a GL_ONE, GL_ONE blend function.

You should also sort the particles by depth and render back-to-front.
You don't need to depth sort if you're doing additive blending. And it looks like he's doing additive blending already (Although it's a bit hard to tell).

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Quote:
Original post by Bob III
The youtube thing - it's missing the vacuum after the shockwave.

It's there, just subdued (most noticably in the final run). Also, note the lesser amount of dust near ground zero (Test #2), sucked into the cloud presumably. Not bad, in my opinion.

My favorite nuclear test videos are Able and Baker of Operation Crossroads (A and B, the military is so creative :p), but that's mostly because they're so difference from traditional land tests.

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Quote:
Original post by Evil Steve
You don't need to depth sort if you're doing additive blending. And it looks like he's doing additive blending already (Although it's a bit hard to tell).


Clearly if all your particles are additively blended then you can avoid depth sorting.

However, if you have any subtractively blended particles (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) in the scene then you should depth sort all your particles, including the additively blended ones. Otherwise you'll get artifacts. I'm assuming that the OP will still want to render smoke particles subtractively, since he's already doing that.

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Wow that link is great. How can I make something even close to that? Did they use a particle engine? How did they make that firey smoke?
Thanks.

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