Making a nuclear explosion?

[duke2]

I'm having a hard time making a good looking nuke. In fact it was looking better and got worse so I don't know what happened:
https://www.youtube.com/watch?v=52Xq0AHuRoc

I'm using what I think are physically correct parameters. The initial object has a radius of 50m, it emits 100k C for 40 frames at a velocity of 300m/s for ~15frames. It ends up looking like a cross between the statue of liberty and a jelly baby.

[Svetlin.Nikolov]

Hey,

Could you share your settings?

Thanks!

[Svetlin.Nikolov]

There are also nuke examples for both Max and Maya on the docs site you can compare settings against. Sharing them both as they work in slightly different ways:

https://docs.chaosgroup.com/display/...pleScenes-Nuke

https://docs.chaosgroup.com/display/...pleScenes-Nuke

Cheers!

[Svetlin.Nikolov]

The trick with nukes is that you need as few simulation steps as possible in order not to let the velocity and smoke dissipate - your SPF should be 1. You need a lot of conservation quality - 100+ so that the smoke would roll better, Multi-Pass advection for maximum detail, and you can pick wither PCG or Direct Symmetric conservation method.

In 3.05 there is a new method in the Input rollout for slowing down simulations after they are completed, called Precise Tracing, which might also come in handy to you, as slowing the simulation the physically correct way by using bigger scale and running it for more frames would again produce too much dissipation and the velocities would disappear during the animation, so retiming after the sim is also an option. You should beware of flickering fire though - here is the docs section on it:
https://docs.chaosgroup.com/display/...Input-FrmBlend

Cheers!