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This codepath is optimized for drawing deforming subdivs with static topology at interactive framerates.

The problem with an editing app is that the step that "flattens" your HBR topology into tables takes too much time for interactivity. Traditionally, modelling apps like Maya or Modo work around this simply by refining a data structure (winged or augmented half-edges) and displaying an approximation on-screen (2 levels worth of subdivision). On the flip-side, our in-house software focuses on animation, not modelling, which is also part of why we have been focusing on play-back rather than editing.Having said that, for OpenSubdiv to gain the ability to edit topology interactively requires us to solve 2 major problems :- non-manifold geometry : half-edge data structures cannot represent non-manifold topology. I have been working on identifying solutions to this problem for the past 2 weeks.- localized topological analysis : figuring out a way of locally updating our FAR tables. This i a very delicate problem... Q: Is there a way to apply edits to a FAR mesh directly?A: unfortunately not at the moment : the logic applied to generate these tables is fairly "non-trivial" : as mentionned above, it is one of our future integration goals.Ideally you want to stick to HBR for as long as possible and only transit through FAR / OSD once your topology is stable.