Edit in HD and do Fusion VFX in 4k?

Im editing a project with 4K footage in HD for better playback performance. I would however like to do my VFX and green screen keys in 4K for optimum quality and downscale those to HD. Is there a way to do this in Resolve 15 using Fusion? Currently it seems the Fusion settings are inherited from the timeline without any way to work in Fusion at 4K while remain in HD on the edit page.

I recommend always editing at the highest quality delivery specs. If your system can't handle that, use proxies (Optimized Media).

you can use the media from the library to stay in the native resolution, but then you lose the edit you made (but can be rebuild from the media in node)

+1

This kind of workflow functionality is a MUST for this to be anything other than a hobby tool.