Rigidbody2D Interpolate not smooth in 4.5

Hi. My main character is a Rigidbody2D with force-based movements and interpolation set to Interpolate. In 4.3 the sprite renders smooth as butter - in 4.5, interpolate seems to have no effect. The sprite jitters every few seconds pretty badly. I have changed nothing in the way I am doing things, and when I go back to 4.3 everything is smooth again. Has anyone else noticed anything similar? Have I lost my mind? Thanks.

If that is the case, this might be a regression introduced in Unity 4.5, so you didn’t lose your mind. I suggest you submit a bug report with a small repro project attached and reply here with the bug number. I’ll make sure it gets looked at and assigned to the right developer.

Unfortunately, I tried creating a quick sample project but I am unable to reproduce. I’m sure it’s because I have a lot more going on, but I submitted a bug report anyway: 612479

I have both 4.3 and 4.5 installed at the same time and when I switch back and forth between the two opening up the same project it is perfectly obvious that something strange is going on in 4.5 Physics2d. With no changes, just opening the same project, the main character is:

4.3 - smooth as butter
4.5 - jerky as hell

Me too, played around with the new “inertia” property thinkin it had to do with the “inertia calculated wrong” problem but now Im not so sure. Its like my characters physics gets updated half the time or something. Very jerky. Kinda sucks after spending so much time perfecting the controls in 4.3

Its something to do with my animation clips. If I replace my characters animation controller with a blank one, or disable it, everythings smooth again

There’s a thread here related to this (see the later posts for interpolation issues) - sounds like several bugs have now been fixed, we just need to wait for the update:

(My ‘broken case’ was simply rotating a RigidBody2D object with transform.Rotate in Update(), whilst interpolation was enabled, in a scene with no colliders, and just a RigidBody2D falling under gravity then being pushed back upwards by applying a force)

Ya it does seem buggy. I installed 4.5 at work and loaded up my same project. Disabling the animator no longer does anything, weird. Back to 4.3 for awhile!