Affinity Photo: how to mix LUTs?

[wclaes]

What’s the best way to mix LUT’s?

For example, I have a couple of photo’s: portrait, landscape, city, etc. They all have different color schemes. Eg. Portrait pictures have skintones. Landscape pictures have green colors, sky. City pictures buildings, concrete, etc.

If I tweak skincolors and ‘bake’ that into a LUT and later on, tweak another picture and again ‘bake’ that into another LUT… then I would like to combine the tweaks into one LUT, so I could use it as a generic color profile that can be applied.

Because, eventually a LUT is a lookup table and I was thinking, the more versatile color re-mappings I could add, the more generic I could make it.

[NotMyFault]

I don’t think this will work. LUT’s are specific to how they convert source to destination colors. If you have LUTs for different scenes, they will include different mappings for the same source colors. 

[Old Bruce]

1 hour ago, wclaes said:

I would like to combine the tweaks into one LUT, so I could use it as a generic color profile that can be applied.

What is your desired end result? A portrait that looks like a .... ?

And a Landscape with the same look?

I am thinking you would wind up with some average grey.

[wclaes]

The desired result is one lut that can be used for all photo’s.

Eg.

lut1 = for portaits with skin colors
lut2 = for landscapes with green

A combined lut could then be used to apply on a portait as if it would be lut1.
The same combined lut could also be used on a landscape as if it would be lut2

So, similar to how a color profile is used…

for example, but then for photo’s

 

[Old Bruce]

Pretty sure what you want, a LUT zed that will give x for Portraits and y for Landscapes won't work. You'll get x dot y  for both/all images. Dot being multiply, add or whatever equation was used for making the LUT zed.

[wclaes]

Hi Old Bruce, I’m afraid that will indeed be the case…

The reason why this idea came to my mind is because the camera color profiles for a canon r5 do not exist.

In other words, only Canon’s own DPP software is able to render colors as I want. Eg. ‘Faithfull’ is a proprietary color profile.

This means, rendering a raw file in affinity, lightroom or in dpp is totally different.

I believed LUTs were the solution.. because affinity lets you ‘infer’ luts. This way, a file saved in dpp and in affinity could give a lut to apply the ‘Faithfull’ profile.

I’m sorry if I’m not totally clear, but I just wanted to get some way to get the same rendered output in lightroom / affinity as in dpp. Seems this isnt easy.. if you google on Canon R5 and lightroom profiles. Adobe doesn’t provide camera profiles for the r5.

Using the Adobe Camera raw converter one can create their own profiles, using luts and using adjustments done manually using the adjustment sliders. So I thought…ok lets use luts. There’s somebody who created profiles like this (search for canon r5 color fidelity)

 

[NotMyFault]

Canon DPP picture profiles are no LUTs. They combine filters like sharpen which cannot be converted to a LUT.

If you use Canon, just do the RAW conversion with DPP and export to TIFF16. 

Affinity Photo is unable and will probably never be able to compete with DPP regarding Canon specific functions like Dual Pixel focus, Digital Lens optimization (kind of sharpening), CA correction, and especially batch processing. Using DPP is much faster and delivers better and more consistent results than Photo. 
 

Then use Photo for all higher level edits.

[wclaes]

@NotMyFault, I totally agree. There’s nothing that beats DPP for canon colors and processing their raw files. The thing I miss are local adjustments and gradients and easier HSL adjustments and speed of processing.

I wanted something better than DPP, with regards to a more modern / easier interface. DPP is also slow.. I have Affinity Photo which was perfect for editing a few photo’s, but not for hundreds. So I’m doing a trial in lightroom… however as mentioned above the colors are wrong. Maybe in the (far) future Serif will have a DAM/raw batch editor… really wished they had it already…but waited for too long.
At the moment, I’ve managed to get closer to DPP faithful colors, and maybe it’s something I can built upon.