Not yet sure about this one, but I thought I’ll open it for discussion.
How about giving the geo COMPs a bunch of variables which are similar to panel variables. Whenever you click/rollover/… on a geometry, these variables would reflect the geometry/viewport interaction. In addition there would be some parameters on the geo COMP to control if it reacts to left, middle or right mouse button clicks (much like the panel COMPs)
This could be a much easier workflow than using renderpicking.
hmmm, but this workflow would loose the ability to control the “selectability” of geometries. Maybe selectable geometries can be controlled via a DAT/list fed into the render TOP