Thanks
If your source clip in Media pool is 4k, your timeline is 1080 and if you set the Delivery back 4k, you will get basically up-scaled footage (confirmed by BMD people). Not a good option. I know that ticking “Render at source resolution” will get you resolution from the clip in the Media pool (that’s great option if you you both 2k and 4k clips and you don’t have to render them manually in different timelines), but I am still not sure is it up scaled too from 1080 timeline or directly from 4k in Media pool?