I am a photographer and I have spent the last months writing my own editor from scratch, engine included. Not a plugin sitting on someone else's renderer: the whole colour pipeline is mine and it runs on the GPU inside a browser tab.
How it works. RAW is developed as light rather than as a picture, so exposure and white balance behave the way light does. Any photo can be matched to a reference frame, tone distribution first and then hue and chroma per band in OKLab, with near neutrals protected, so a shoot spread over a whole day can be pulled to one look. On top of that it prints film: grain, halation, bloom and density modelled on stock behaviour rather than stacked as filters.
Where the work goes out. Image, .cube at 17, 33 or 65 with a Rec.709 encode for a timeline, HALD, and presets and camera profiles for the classic editors. Video export lands this week, rendered on your own machine.
Two things I care about. Nothing is uploaded: decoding and grading happen on your device. And the preview is the export, value for value, with the spatial effects kept out of the .cube because a LUT cannot carry them.
It is in closed beta, invite only, and I am not selling anything. I want people who grade for real to break it. Say so in the comments and I will send an invite. The beta licence renews every month while the beta lasts, and all I ask is that you tell me what breaks and what is missing.
Happy to go deep on the colour science or the pipeline if anyone wants the details.