Simulate nth frame?

[KristianThuesen]

Hi. I have a handheld shot here of which i recorded at 48 fps in order to be able to 3d track it. I am having real issues on getting my 3d camera to scale to 50% speed properly and was in this case thinking of maybe just rendering every other frame.

How would i go about using the time scale feature in phoenix for this? Is it an okay solution. If i set it to 0.5 and render every other frame, would it look the same as if i would have it set to 1 and render every frame?

EDIT: Finally managed to fix the camera to match the footage, But i am still interested in this and if time scale also increases simulation time?

[Svetlin.Nikolov]

Hey,

Re-timing right now really depends on whether you are doing liquids or fire/smoke. With FLIP liquids, you have particles that are moving and you can change the play speed any way you like and the particles will be interpolated for that moment of time, the mesh will be rebuilt from these particles and everything should be great, given that you've exported IDs of the particles. Blending between two caches would take some time and since it would happen at render time, it will happen every time you preview or render the sequence, so if you simulate once but render many times and at the same time your grid is of a very big resolution (say, 50M+ voxels), it might not be such a good deal. Re-timing of fire/smoke is a bit more complicated and happens using Resimulation, so it would be less likely to be of help in this particular case - you can check here for more info on that: https://docs.chaosgroup.com/display/...time-scale,etc.

Hope this helps, cheers!