Hello:
I've rendered a long 3D animation of a tool over a dark grey cyc with pools of light on that backdrop. It's a 16-bit PNG sequence animated and rendered in Cinema 4D, tagged as sRGB. When I apply RSMB to that sequence I get noticeable color banding in those gradated areas.
I'm working in 16-bit color in AE CS5. The sequence is tagged as sRGB in the Interpret Footage dialog. Color management is set to HDTV rec. 709, compensating for scene-referred profiles.
Changing the AE project color space to sRGB or deactivating Compensate for scene-referred profiles doesn't mitigate the banding.
I can definitely see the banding come and go as I turn the RSMB effect on and off. What's really weird is that I created a split screen showing the same frame of the 3D PNG sequence with RSMB applied to one and not to the other. The banding is clearly visible in my AE comp window, but the PNG doesn't exhibit the banding. I then rendered a ProRes 4444 Quicktime, and that does show the banding, even though it's Trillions of Colors.
I've posted a very short sample here, ProRes 4444:
http://www.marshall-arts.net/Banding/RSMB_Banding.mov
Any guess as to what the issue is? I'm on a 2008 MacPro with an ATI Radeon 2600 card, OS 10.6.8.
Thank you.
Shawn Marshall
Marshall Arts Motion Graphics
