tiko_ur

Ok, so you're basically saying that I shouldn't cache the retimed sim, but to retime the all simulation using the render settings?

Am I right?

Thanks for your reply, by the way.

Reseed particles is already off, as I had this sort of strobing on the fluids. Turning off that fixed the problem.

Nope, all the sims are cached separately, I am not merging them. Also, all the sims are retimed before I cache them.

Anyway, if it is of any help, I'll post the HIP file.

Hi guys,

I am quite a newbie on Houdini, and I am actually working on my first project.

This projects basically consists of an egg being hit by a bullet, with consequent exploding behaviour of the shell, yolk and albumin.

The whole shot is retimed by approximately a twenth of the speed and that's where I got my problem.

On specific frames the simulation kind of changes behaviour. So, for example, the shattered pieces of the shell are following a precise direction and on frame 20 they suddenly change direction. The same thing happens for the yolk and the albumin.

More technically, yolk and albumin are FLIP Fluids, and the shell is prefractured in the SOP network. The whole simulation is retimed with TimeBlend/TimeShift Nodes.

Watching the shots several times, I realize the change of direction occurs on the frames that already existed in the shot that was not retimed. So I guess this has something to do with the interpolation, but I can't find a way to fix it.

Any suggestions?

Thank you