I have an animation, and i want to speed ramp from frame 20, so I’ve made a linked copy of the scene, and set the time remapping in the output properties from 100 to 400. I’ve set the render start frame to 80, and I this is the exact same frame as 20 in the original, non time-remapped scene, plus you can see where the ‘real’ time is on the timeline:
Pretty handy, and hitting space plays back the section in slow motion. so far so good, but when I hit ctrl f12 to render the animation, it’s rendering a section from much earlier in the timeline - the first rendered frame from the time-remapped scene is somewhere in between frames 4 and 5 of the non-remapped scene.
If I do a viewport render, the frames rendered are as expected - 80 onwards which correlates with frame 20 onwards from the non-remapped scene.
Here’s the blend file, it uses Suzanne rigidbodies so I’m not sure if the physics will be included in the file, but you should be able to see the camera motion at least:
time_ramp_test.blend (1.3 MB)