did some hunting around on here and found this workaround.
just opened the Interpret Footage Dialog box,
click "More Options"
click "Save to RMD" and then OK, OK and footage is sharp again.
Thought I had to go buy more ram for this trashcan!
FYI, for anyone else (like me) who experienced this pixelation / blurry R3D problem in Premiere CC 2014, the same issue can be solved by right clicking on the problem clip(s) in the timeline or in the project files panel, selecting "Source Settings," and clicking "Save to RMD."
Also, this blurriness was even retained after exporting to Quicktime files, which created a huge headache for us as we tried to figure out what we were doing wrong in our sequence or export settings. Turns out both of them were fine, it was just this "Save to RMD" glitch.
Thanks for the info, but I bet it would do more good posted in the Premiere forum; this is the After Effects forum.
We intend to release a fix for this problem in an update in about a month. Stay tuned.
I am having a similar issue. I've got a lot of R3D footage in my after effects comps that I am trying to remove the green screen from. I can get it to look great and then on export there are one or two or many frames that are heavily pixelated. I go back into my composition and navigate to the frame(s) in question and they're wonky in the program now. I use your work around above and it fixes the issue maybe 50% of the time, but only for a little while. Going insane; deadlines to meet.