Blackmagic Forum

I have been working on a LUT for the PCC4k for a few months now. The goal was to get a natural looking image with most of the dynamic range intact, beautiful skin tones and a nice highlight roll-off.
The LUT is also nice for the camera LCD, to feed an external monitor like the Atomos Shinobi and for a client monitor - so it has to look pretty.

I also tried to tackle the problem the PCC4k has with intense reds when they clip - they turn into pink.

Currently there exist three versions of the LUT:

LBK-Neutral-Hi-DeSat v5
This LUT is almost neutral to the colors in any way, it handles mixed light situations quite well, the highlights roll-off increasingly de-saturated like analog film. It has a nice glossy look, but therefore does not show the last bit of details in highlights (they are there but very low contrast for a smooth roll-off).

I have used this LUT for half a year now.

Then there is a modified version which does some things better, a few things worse than v5.

LBK-Neutral-Hi-DeSat v9
This LUT has been built on the base of v5 but offers some interesting modifications.
1. Retains more details in the highlights, but the trade-off is a less glossy look compared to v5
2. Better handling of almost clipped and clipped reds which get shifted back from pink to red, but might have side effects on other reds
3. Less magenta in skin tones than v5 - reminds me more of the way the Alexas render skin tones
4. Less magenta and less yellow in green tones which changes grass and leaves back to a more natural, less brownish look
5. Slightly increased over-all saturation compared to v5
6. Better suited for filming fire, flames, sparkles than v5

So far I haven't found any footage where these two LUTs would behave unexpected or strange, but you never know what happens when filming mono colored LED light. So keep an eye on that.

NEW: LBK-Neutral-Hi-DeSat v10
I've again modified v9 after finding a few flaws with reds turning too much into orange. Should work better with roof bricks. This effects also skin tones and make them more balanced between v5 and v9.
You should prefer v10 over v9

Please post your feedback below.

Download links and before/after footage will follow soon in the next posts.

Download the LUTs here:

Thank you for sharing, Robert! Appreciate also your taking the time to create & demo the LUT.

I'll use it for a while and report back.

Cheers!

Great looking LUTs Robert, thanks for sharing them.
Cheers

NEW: LBK-Neutral-Hi-DeSat v10
I've again modified v9 after finding a few flaws with reds turning too much into orange. Should work better with roof bricks. This effects also skin tones and make them more balanced between v5 and v9.
You should prefer v10 over v9

You are awesome! I really appreciate you making something that I find a lot better in most situations compared to the Extended video and ESPECIALLY the crazy Video modes of the BMPCC4K. Looks good, doesn't go overkill, and works well for quick grades when they are needed.

Thanks!

Glad you your having fun with the LUT, Alex

Hi Robert!
the Lut works in the same way with Gen5?

Thanks.

javier forza wrote:Hi Robert!
the Lut works in the same way with Gen5?

Thanks.

No, that is not possible as Gen 5 is quite different. I have started to create a Gen 5 version but atm I am lacking of comparable footage. Before I created the LUT for Gen 4 I already had used Gen 4 for a year and knew what I liked and what not and had shot hundreds of hours of footage with it. Unfortunately most of my footage was shot in ProRes so I can't just switch it to Gen 5 in Resolve and test it with the same sources.

I have started crafting a Gen 5 LUT for the UM12k because someone here on the forum was looking for help and a better starting place.

But if people want to help me they can provide sample footage shot in Gen 5 like fire, skin tones, landscapes in cloudy, sunny, dusk light situations, cars in different colors like white, grey, metallic, black, red, yellow, green, blue, flowers, trees, grass and leaves, forest, sky and sea.
So I can test the Gen 5 LUT with lots of different content.

Thank you Robert.
Your work is very good.

I believe next BMPCC firmwares will implement Gen5.

Looking fwd to the updated version for Gen 5

smunaut wrote:Looking fwd to the updated version for Gen 5

Already done - you can download and test it here:
viewtopic.php?p=754352#p754352

Feedback is welcome.

Oh very nice thanks !

@Robert Niessner, I tried (LBK_neutral_High-desat-Gen5_v2_33.cube) and the skin tones are very problematic. The shoots are balanced in the camera , only natural daylight without other lights in the ambient... but, anyway, I tried doing the balance again in Resolve but appear that is not very well calibrated. Too pink and orange. Maybe appear more a mistake of settings into the Lut. I can't see to much with only the LUT file if you need more opinions.

Javier, did you test that particular LUT with color science gen 5? And with which camera?
Can your share some BRAW footage and maybe a project file?

The LUT itself does not change the white balance, hence the neutral in its name.

Thanks for this LUT, Robert. Did you say that I just have to have it as a file on my SSD or SD card and it will automatically connect with the footage. I'm new to my camera, so very much appreciate any help.

Whitney Smith wrote:Thanks for this LUT, Robert. Did you say that I just have to have it as a file on my SSD or SD card and it will automatically connect with the footage. I'm new to my camera, so very much appreciate any help.

You have to copy the LUT onto your SD card or whatever media you are using. Then you have to go into the camera menu and import the LUT into the camera’s internal memory. Afterwards you can activate the LUT.

I’d recommend you to download the camera manual which contains more details on how to do it on p.93:
https://documents.blackmagicdesign.com/ ... Manual.pdf