I exported v3 from Resolve on h.264, but when I converted the file to Handbrake and turned it into an MKV file, I found that the color grading looked off. So, I exported from Resolve on an 8-bit DNxHD file instead, and the converted MKV file from Handbrake looked much closer to the color grading I saw in Resolve, which is good.
That aside, I finished testing the lossless 1080p version just a few minutes ago. The conversion worked perfectly, and the FLAC 5.1 soundtrack sounds right (at least, for my TV stereo speakers). I will be testing the lossy, compressed 720p version with AAC 5.1 tomorrow. If all looks well on that version, I’ll be ready to release v3 for now.