So I've been asked for 6K (5568x3132) ProRes deliverables for finishing on multiple occasions from clients. In the past I have simply told them the highest resolution I can render out is 5K (according to the Prores white sheets).
Yesterday I had a client come in with some 6K r3d dragon material and wanted 6K Prores back for the deliverables, so I figured I would go ahead and try the 6K render just to see what happens. Although I was only getting 3fps render speed, the render worked and I now have a 6K Prores file!
I guess my question is, does this seem right? Am I missing something? Could the insufficient data rate cause a hit in quality? Although I cannot see a visual difference on a 50" plasma. Everywhere I have read online it says Prores will max out at 5K.
Of course, that's really not 6K - it's 5.5K - but I'm just quibbling.
[Russell White]"Everywhere I have read online it says Prores will max out at 5K."
It's probably because that's what Apple tested and that's what the specs are based on. I believe the ProRes family is resolution-independent and can take any size.
[Russell White]"Could the insufficient data rate cause a hit in quality?"
Use ProRes 4444 XQ if you want the maximum ProRes data rate. I don't think you want plain ProRes if this is supposed to be a master-quality transcode of a RED camera file. If this is just for offline editorial, then it doesn't matter.
[Russell White]"Although I cannot see a visual difference on a 50" plasma"
A 50" plasma would be 1920x1080, right? You won't see any difference at all between 1080 and 4k, 6K, etc. except for the added value of oversampling when rescaling to fit the monitor. The sort of data rate differences that might be a factor are invisible even at 1:1 pixels on something as coarse as a plasma screen. Even on the best monitor, it would be unlikely to visibly see any difference without applying some type of difference overlay for comparison.