Sun Mar 10, 2019 6:10 am
What I can tell the o.p. is that many, many major films are actually color-timed in EXR or DPX format, because it's kind of a "universal" format for live-action shots, transitions, VFX, titles, speed ramps, and other kinds of material. Rather than mix back and forth between (say) R3D and ProRes and BMDRaw and ArriRaw, they just convert every single shot to a common standard like DPX and then use that for the final. There is no loss with a lossless format.
Of course, it's key that these uncompressed DPX shots are done with the correct Raw settings (exposure, color temperature, etc.) to give the colorist enough range to pull the shot in to range for final color. But it's done all the time. There are actually advantage to using a "mezzanine" format like this, since the computer no longer has to decode the Raw while playing it back.
marc wielage, csi • VP/color & workflow • chroma | hollywood