Welcome to our community

Be a part of something great, join today!

Log in
  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

Resolve 10 Qualifier Bug?

Steve Sherrick

Steve Sherrick

Well-known member
Joined
Dec 28, 2006
Messages
7,275
Reaction score
54
Points
48
Location
Boston
I was grading some BMPCC footage that I shot during Christmas and I set up my node tree like this: LGG>Curve>RGB Mixer. I then setup a 4th node to qualify skin tones and when I then decide to delete that node the grade I had before I created that qualifying node is now different. Image is lower contrast, less saturated.

I should also mention I am using an Output LUT (Hook BMCC_BMDFilm2Vid).

I am going to try and recreate this issue with some other codecs such as R3D and Alexa files. Has anyone else ran across this or can your reproduce this on your end? At the moment I'm not trusting my Resolve system and I don't like that. :-(
 
What happens when you grab a still with 3 nodes, add the 4th node with the qualifier and then compare it to the still while bypassing or deleting the 4th node? They should be the same. In order to compare the still store with "live" image you need to use the viewing LUT and not the output LUT.
I never seen what you're describing. Resolve is a full float software and with that kind of precision it's pretty much impossible to affect the signal to the point of not being recoverable. Actually, that doesn't even come into play. Adding and then deleting a node shouldn't affect the image at all.
 
This is kind of bizarre. I had downloaded some luts from ColorGhear just to play around with them. Trying to track down what had changed with my system, this was really the only thing, so I removed these from the LUT folder and now that problem seems to go away. Not sure why having these in there would do anything like what I described, but removing them seems to have fixed the problem I was seeing. One other thing that led me to this was I was attempting to apply a 3D LUT output and noticed it was having no affect, again something I hadn't seen before. After removing those ColorGhear LUTs problem went away.

So much for experimentation. :-)

As always, thanks for helping out Jake! Btw, let me know if you have time coming up to do a remote grade test.
 
Honestly, I'm pretty much on board with Marc Wielage, when it comes to use of "creative" LUTs. With a couple of exceptions, they are pretty much all a big rip off and their clams of "film emulation" or "one push of a button look, that fits all images" are a big lie.
As far as a remote grading test, I'm actually thinking bigger, than that:-)
I just finished my move to the new studio in the loft in Glendale and I'm thinking of organizing an informal get together for anyone in LA, who's interested in anything color finishing related. It will be a casual meeting, where anyone will be able to ask any questions about pretty much anything, relating to color grading, roundtripping between various NLEs, beauty clean up using Resolve or Mocha and Photoshop, etc. So, as a bonus, we may do a remote grading demonstration between our two places. Anyone interested? I'm thinking the middle to end of January. Anyone in LA up for the meeting? Steve. Are you interested? You can participate via the Skype:-)
 
jake blackstone said:
Honestly, I'm pretty much on board with Marc Wielage, when it comes to use of "creative" LUTs. With a couple of exceptions, they are pretty much all a big rip off and their clams of "film emulation" or "one push of a button look, that fits all images" are a big lie.
As far as a remote grading test, I'm actually thinking bigger, than that:-)
I just finished my move to the new studio and I'm thinking of organizing an intimate get together for anyone in LA, who's interested in anything color finishing related. It will be an informal meeting, where anyone will be able to ask any questions about pretty much anything, relating to color grading, roundtripping between various NLEs, beauty clean up using Mocha and Photoshop, etc. So, as a bonus, we may do a remote grading demonstration between our two places. Anyone interested? I'm thinking the middle to end of January. Anyone in LA up for the meeting? Steve. Are you interested? You can participate via the Skype:-)
Click to expand...
100% agree that most of the time I apply these type of creative LUTs, find they don't work so well for my footage, and delete them immediately and roll my own. Every once and a while I try to cheat. For example, this BMPCC footage I shot during the holiday. Was going for a bit of texture and figured I'd mess around with some of these LUTs I had downloaded. Clearly I'm back to rolling my own again. I'm definitely not a professional colorist, so I do fall into these traps sometimes. :-)

Sounds like a great opportunity for people in LA to take part in your meeting. I would be happy to do so via Skype and if you wanted to use me as a test subject for remote grading I would be more than happy to take part in that as well. That would be a lot of fun.
 
The big problems with "creative" luts is that they are not adapted to each image you are working on. Copy-paste of looks generally only works between images shot the same day by the same camera under the same light. Even if images are technically the same, the size of elements in the frame affects perception and can make even this narrow application of copy/paste not work.

And don't get my started on Vimeo Kiddie abuse of MB looks and cheesy plugins like MB Blockbuster.

You can't cheat art and good taste with a one-click solution.
 
Robert Ruffo New said:
The big problems with "creative" luts is that they are not adapted to each image you are working on. Copy-paste of looks generally only works between images shot the same day by the same camera under the same light. Even if images are technically the same, the size of elements in the frame affects perception and can make even this narrow application of copy/paste not work.

And don't get my started on Vimeo Kiddie abuse of MB looks and cheesy plugins like MB Blockbuster.

You can't cheat art and good taste with a one-click solution.
Click to expand...
Usually when I'm using a creative LUT it's stuff I've shot for fun such as family videos or things of that nature. But even then I seem to go back to starting from scratch. Sometimes I don't even use a LUT at all and just create my own look through many of the tools in Resolve such as the RGB mixer. And for anything that needs top notch color correction, then it heads off to a professional colorist. :-)

In this case, I was having some strange issues with the qualifier tool and now wondering if I just had a corrupt project perhaps. That would be the first time I have experienced that if it's in fact the problem.
 
Steve, (Happy New Year by the way) sometimes restarting Resolve helps, and if not I have found that a cold reboot is sometimes necessary, as weird stuff can get stuck in the GPU.
 
Robert Ruffo New said:
Steve, (Happy New Year by the way) sometimes restarting Resolve helps, and if not I have found that a cold reboot is sometimes necessary, as weird stuff can get stuck in the GPU.
Click to expand...
Happy New Year to you as well. If this issue pops up again with another project I'll see if there may be a hardware issue going on. I'm on an older Mac Pro with a GT120 and GTX 285 GPU so who knows, maybe some gremlins in there. Hoping it's a one time thing. :-)
 
You must log in or register to reply here.
Back
Top