I am not yet using v035, but the issue I am noting is with the Blue channel and I am not sure v035 will fix as I also note it with using ACES Transform in Resolve and previous versions. So I am placing post here… please move if better suited elsewhere.
Something does seem off with the blue channel. I am using DaVinci Resolve 18.5
I selected a couple test images and then made nine frames of each. I then used the RGB Mixer to set each to a single channel of R, G or B with either rec709, rec2100(rec709sim) or rec2100(P3D65,540nits) The RGB Mixer node was placed last, after the transforms and with ‘Preserve Luminance’ unchecked.
In both SDR and HDR the blue channel showed issues in that lighter parts look disproportionately lighter. There may be also issues in the darker portions. In particular looking at the neon COFFEE sign in frame 0075 (blue bar): In the blue channel the higher brightness level looks not only too high but then also seems to reverse (sort of like a solarization.) In the SDR rec.709, one must look carefully, but will see the same (wiggling the gain adjustment can help to see it.) This is the same in both SDR and HDR, but more noticeable in HDR.
I then checked some earlier versions to see where this issue might have first appeared. I found this issue in the blue channel always appeared. So then I tried in ACES 1.3 SDR and HDR and also the issue appeared.
Then I replaced the ACES Transform with a DaVinci Resolve Color Space Transform. Input space/gamma to ACES (AP0)/Linear and output of rec.709 Gamma 2.4. The issue DID NOT SHOW and changing gain would vary the brightness as expected.
So then I changed the Color Space Transform output to ‘use timeline’ which was still set to ACES as it had not been changed from working with ACES2. And I added a DCTL of the v034 rec.709. Some of the issue (solarization like effect) could then be noticeable when twisting the gain.
I then repeated for HDR settings. (DCTL node disabled; output color space of the CST set to P3-D65/Rec.2100 ST2084; and the color management output set to Rec.2100 ST2084 and remaining on timeline of ACES)
Changing gain would vary the brightness as expected with NO ISSUE.
Then the CST output was set to timeline and the DCTL for HDR v034 Rec.2100(Rec.709sim) added. At lower gain settings the letters of the sign were darker than surrounding and with higher gain higher than surrounding. Remember this is looking at the blue channel only.
And then with the DCTL changed to Rec.2100(P3-D65, 540nit limited) the issue can be clearly seen, also looking like solarization as before.
These results can also be seen clearly in frame 0058.
Frame 0017 also shows issue in area of sun (there is also a bit in the red channel, and green channel at low levels.)
Frame 0050, the blue glass on table shows issue when gain is lowered. (I am also remembering the green bottle shown at meeting, but I was concentrating on Blue channel here.)
Related or not, several frames show noticeable banding in individual color channels with blue having the greatest amount.
frame 0035 shows lots of banding in all channels (output monitoring is 12-bit 4:4:4)
frames 0039, 0045, 0060 show significant banding in blue channel