Welcome to TVPaint Community forums !

Imagine I had a large background image, a camera moving across it, and a character animated walking across that background too. The character is animated on twos.

I'd like to have the camera move 'quantized' to twos, to avoid the jittering that comes with the use of two different frame rates in the sequence. I thought I might be able to get this result by changing the camera's Parameters > Frame Rate value to 12, but when i preview the scene it seems not to have made any difference.

Is there any way to achieve this in TVPaint? Or alternatively, what workarounds have you found helpful?

Do it on 1's and stretch.
Example: The camera move shall be 100 frames long. I do it in 50, then stretch that timeline without interpolation to 100.

Thanks for the reply. I'm not sure how to stretch the timeline so that the camera movement is affected (stretching individual layers doesn't affect the camera). Can you elaborate?

A related thing: Does anyone know what the purpose is of the 'frame rate' value in the camera's Parameters? (when might you want to use it, and what does it do exactly?)

Ah, sorry, of course you first have to render the layers.