I’m wanting to create a viewing LUT for on set monitors but I’m having some problems. Normally I would concatenate an IDT, RRT and REC.709 ODT using the OCIO tools (is this an acceptable way of doing it?). However in this case I’m working with The Blackmagic URSA which has no published IDT. What I’ve tried is running the OCIO LUT image through resolve with the URSA IDT and the correct RRT/ODT and then pulling a LUT out of that with OCIO again.
It sort of worked but there’s a slight tone shift in the image, almost like an incorrect white balance, when I compare applying the LUT to an image and using the proper workflow on the same image.
I’ve only used a 64x64x64 cube so could that be the issue? Also the footage I’m testing it on is raw so are there any extra steps going on there that the LUT image wont have taken into account?
I did get in touch with Blackmagic but this was there response:
The best way to generate a LUT that represents the ACES transform would be to grade one of your standard clips to, match the clip created using the ACES colour space workflow. You can then generate a LUT from this and import it to your monitors.
Which seems a little hacky to me, any advice?