Cameron White

There isn't currently a way to get tangent handles in the APEX motion path - that's on the todo list for some future work.

If you have existing animation on the camera, one option is to bake that existing animation to the APEX rig and then animate on top of it. This option exists for the "Prop" rig mode on Configure APEX Rig (which has a simple transform control for the camera), but isn't available yet for the camera rigs.

Going back upstream to the original camera LOP is also an option if you want to just edit the original keys more. The LOP is being evaluated each frame and produces time-sampled USD attributes (i.e. dense samples) so downstream operations won't see the original sparse keyframes

You'd need to have a rig attached to the camera - this can be done with the Configure APEX Rig LOP to either attach a simple prop rig (single control), or a camera rig with lookats etc

Then, in the Animate state you could turn on the motion path display (https://www.sidefx.com/docs/houdini/character/kinefx/animatestatemotionpaths.html)

For motion paths, the triggers are represented just as point groups on the motion path points so you could use other SOPs to generate the triggers if you need something very custom. Otherwise, you could also use the random delay options, etc to produce some variation between agents