So I finally got a hold of Ray's UHD test patterns and made a stab at creating my own gamma curve. Until now I've used Mannis newest 4000 curve for 135 nits, which looks great in my setup: RS400 with 3.6 m throw, 90" 1.0 gain screen, low lamp, all black/velvet and light controlled room, calibrated with Autocal and Spyder5. But I thought I'd try the Arve tool to see if I could get even better results.
I chose the Mad Max scene at appr. 29.05 (recommended by Manni). Structurally it went well in the sense that I got through the whole process (phew) including finding the right bbo number to make bar 77 and above visible (in Rays black clipping pattern).
I found setting the contrast level a bit difficult though, and I actually skipped the Brightness setting altogether.
in the Mad Max frame above, I had to turn the contrast down to -30 to reveal all details behind Max's head (the brittle smudges and stains placed to the left and right in the bright window frame). This level rendered a very dim curve, obviously
. The curve is much dimmer than Mannis premade one. Question is, is there a better scene or am I doing something wrong ? It seems this one is quite extreme in brightness. Perhaps I should just let some of these details be submerged in bloom, but it's hard to know where to stop the bloom or let it conceal stuff. The details in highlights in this scene are abstract/non-figurative so perhaps that makes it hard.
This is just over my head. I tried entering some numbers according to Lovingdvd's speed guide but it seemed to make no difference. Also very hard to know which results to deem as good.
As I mentioned, Mannis premade curve is very nice -- and I think my setup lightning-wise is quite close to his (except the projector) -- but it would be nice to make a wholly custom made curve that is not as dim.