Bounce trees with explosion

[anicg]

I liked this effect of trees bouncing as the heavy explosion happens (though I would tone it down a bit), but I'd like to know how you would go about doing it in Houdini if you have SpeedTree trees. He did it in C4D:

 

[kleer001]

Depends on the state of the geometry I got. First I'd use a low rez proxy of the tree for timing, just animating it up and down, and get approval on that. Then I'd do some R&D into mid rez trees with a vellum cage as the shading gets hammered out in the texture/surfacing department. Then I'd so some R&D into getting the leaves to jiggle believably, probably copy stamps or instances, either with the rotations being the main thing. Then I'd probably be moved over to another shot and forget about it for a while. Then it'd come back with new animation and I'd need to update everything. Then I'll get final approval on the shading then go forward with final sims, probably do two or three master trees in high rez and copy them around with rotation and timing offset.

 

TL;DR : Vellum.

[tamagochy]

It's easy to create spline rig (ok not so easy, but as I know you can export splines from speed tree) and use wire solver, transferring velocity from explosion to trees, for simulation. Then create matrix for leaves and add rotation to them using speed of the branches

Edited April 9, 2019 by tamagochy

[kiryha]

I think in SpeedTree you can create such type of animation for your tree and then just clone (offesting timing) animated caches.

[RoaringDog]

On 4/10/2019 at 12:41 AM, tamagochy said:

create matrix for leaves and add rotation to them using speed of the branches

Can you please elaborate on this ? It sounds like a cool technique.