I d like to ask for a feature request. I googled a bit and didn't find any similar thread.

I have been using Lut's and color grading apps for some time and i have some luts i use most of the time. Since the last releases color management features in krita have improved quite a lot and we have a lut docker. On to my request,

If it's easy to implement, it 'd be nice if we could import a lut file from a grading app to krita as an adjustment layer and then use a masks to drive it's result?
It 'd be nice to try some movie looks on drawings, and it 'd be easier to visualize the end result if working on a film.
Also using luts is usually quite fast comparing to usual filter processing.

So do you think it's possible? I know you(developers) have your priorities, so all i am asking is if it's easy to implement, then why not?

Just a thought, let me know what you think.

I don't know if this is the right thread for a feature request, so if it's not please do move it.

I have to confess I'm not totally clear on what is needed here -- do you have some concrete examples? Doing a filter that takes input and applies a lut isn't hard to do at all, maybe not more than two days of work... If we've got a good idea of what to do, the right thing is to add a wish item to bugs.kde.org.

Exactly as you said! A filter that takes as an input a LUT file and applies it to the image.

It could be very useful since many luts are now available online. But there are also a lot of different lut files(*.cube, *.3dl, etc) so that may be a bit of a problem.

i am not sure i understand what kind of example you need but i ll be happy to look for some when i do( i think photoshop has an import lut function but i am not totally sure if it's applied as an adjustment layer or filter effect).

If we had that kind of functionality, i d be happy to supply as many luts as possible so we could have a small collection of color correction presets, plus we can easily find luts for film stocks(for a more cinematic look, color space conversions preview, etc).

I ve also come across a program called 3dlutcreator. It's by a russian developer and some of the info around it is in russian, so i can't be of much help there(i don't speak russian) but i think it's based on two open source libraries. Don' t know if this is much help to you but thought i should mention it.

Edit: the libraries are freeImage and littlecms.

Is LUT more for video editors?

Does blender have LUT?

Lut is mostly for colorists and compositors. Video editors use them also but it's not as critical for them.

I don't think blender has such functionality as of now. But blender is more focused on vfx and not on compositing.

Either way, luts is like a preset look that contains non spatial color transformations.
The reason i asked for it is because if krita aims at matte painting, it may be a nice way to preview the way it's going to look after the compositing is done.

Plus, using luts is generally faster than doing contrast, brightness, hsl transformations since the look is baked in(it's just a table that maps values more or less) and there is no need for complex calculations(from what i have read online at least) and propably luts will be able to handle color space conversions as well.

I am no developer though so i guess there are people more fit than me to answer this.

Edit: Some more digging for programs using luts, i found ycms in doom9 forums (http://yesgrey.com/ycms.html) not for color grading though,
a blender addon that edits 3d luts (http://blenderartists.org/forum/showthr ... LUT-Editor)
and lastly avisynth is able to use 3d luts for faster conversions.

Excuse me, but do not tell me ...
appeared filter RGBLUT
https://github.com/mltframework/mlt/blo ... r_rgblut.c

it can be used to work with the realy LUT?
how to use it is not clear in kdenlive.
The filter has no parameters

Sorry to bring this up again,

but TheraHedwig said in another thread that it is possible to load luts in krita through the use of ocio configs.

I didn't want to hijack the other thread so could someone point me to a link or some information on how to do this?

It won't work as an adjustment layer: it's an alternative to icc-based color management. Open the LUT docker from the dockers menu, select OpenColorIO in the dropdown and a config, and you're in business.

You will need to make a config to get it working though.

OCIO is also used by blender, so...
Check here: http://wiki.blender.org/index.php/User: ... _Profiling
Start at 'Hook the 3D LUT into Blender', the page also explains how to make your own luts, but since you already have one...

What isn't supported yet is the baking of LUTs.

Well, it's not the same as an adjustment layer but could be useful in a number of cases, matte painting being one.
That way you can preview your final image and do corrections before compositing.

Thanks TheraHedwig, that was what i needed to read!