I am making a game with Unity Physics but for now the biggest thing that is missing is not running in fixed step and the lack of interpolation. Yes, yes, I know you can run the simulation in fixed steps manually, but it is still not "officially" supported. And one of the reasons why you can't just run the simulation in fixed steps is that there is no support for interpolation at the moment. Interpolation is necessary for rendered motion to be smooth and not jittery. I have a feeling that an update that is going to introduce it will bring some structural changes so I am a bit unsure if I'll have to rewrite everything to support interpolation or if I should wait first. ... and how long? I don't wish to embark on a project and then have to wait for a year for that to happen. So, it would be really nice if some light could be shed on that topic.