Ok, little more:
I’ve got car. Car is detailed group of objects. Those objects are parented to the simpler “skeleton” of the car, that is rigid body (for easier calculations). There are some constrains between them.
I don’t change anything in the project (or at least I can make a scenario when I open file, bake all, save, quit, open again and rigid bodies are messed up.)
Messed up = hull of car is rotated in 90 degrees, doors stays in place, weels are not in proper positions.
I found that:
- Only first frame is good = all bodies are in correct place.
- I can work on baked sim without problem untill I quit.
- If I want to Bake to Animation, I HAVE TO bake it from frame 0-end of animation (for example 0-450). If I bake it from 50-end, or even 2-end animation is “messed up” like I would quit blender.
it’s hard to repeat from clean file, because that kind of suprises always come out in little more complex scenes, and I don’t even know how can I recreate that.