Yes, I do understand the ramifications of what I’m saying. That said, this is the situation I’m in. Its likely that the master will be 2k or HD, but the DP (who is highly experienced in doing DIs) insists that if we start with 4k, we have the best chance of matching the cameras together and getting a homogenous look.
So although I agree that its not going to be a true 4k DI, its a starting point for us, and will help our DP to get the look he wants before we squash it all back to 2k.
What I’m looking for is the best up-res solution. I understand that its not ideal.