Just shot this yesterday, I would have thought Redcode 6:1 would be able to handle this but it looked like it was breaking up heavily when a large portion of the screen was filled with the illuminated LED's but clean and sharp when they were not. It looked really bad like a scaled up, overly compressed jpeg with blocky jaggies all smoothed out and mushed up.
As it is there was no time or budget to reshoot those shots but once I had spotted it immediately I got the card to my station I suggested the DOP to change up to Redcode 3:1 and also light and expose for ISO500 because most of the mush was more prevalent in areas of heavy noise and we were shooting cropped in (3KHD) under tungsten lighting with a lot of blue in the subjects (little blue spectrum light lighting a blue subject on the noisier blue channel and then zoomed into that noise! - dodgy combination). The clips shot with these settings seemed to be fine but they had changed the background video projection and framing so I don't think so much of it was filling the frame at any one point so it is not a scientifically proven solution but the footage did look very noticeably better.
I remember a thread from a while back where someone at RED was talking about the need to tweak the redcode for some particular resolutions and framerates - as 3KHD is a new addition maybe this is the case again with it?
Obviously the shoot material is confidential but I can PM a sample R3D trim to you guys at RED if you give me an address to do that at. Though this forum section says open a support ticket before posting I couldn't find a place to do that on RED.com.
UK based D.I.T. with Brownian Motion