Jonathan Mack

If you hit 'u' to go up a level, do you see your ramp again on the parent node's parameters? If so, this is where you want to animate.

jarjarshaq
Does Karma have a shutter shape like Mantra? Other renderers call it shutter time (prman) or mental ray ()called it shutter efficiency.

I think this lives on the karma physical lens shader now

Ah, this tripped me up before too. Don't use the second input of the instance node. This uses a points prim that's already been translated as USD. It will not inherit any attributes from USD points.

Attributes can be inherited from SOP points. To instance on SOP geometry, either put the instance points inside the instance node, or set the 'external SOP' path to point to the SOP geometry containing the instance points.