How do you expect that to work? Are you adding a bitmap sequence and trying to have it update with the timeline or is there some other way that would work?
We can look at adding that for a future release if we get a clearer idea of how it would work. I'll look at what release we plan on adding that to, as we're finalizing the new release pipeline, we have more frequent releases now planned.
There's a few changes I think we will need to have in place for that to work reliably, some of which that we're currently working on. It may have to wait until July or August to be completed after those are done. I think it may have to come for 2.5.0, which we currently have planned for in August.