Using the zone display at the top, picking a zone will highlight at low res where it is in the image, but that results in clumsy searching. There doesn’t seem to be a way to go from a point in the image to a zone. It’s also mated with the Zones info panel, and will show you where the zone you’re about to drag appears in the photo. So it’s equivalent to the standard curves tool, but gives you a different display to work with. This lets you mark points in the source value space and drag them to where they should be placed in the destination value space. ZoneMapper / RAW Tone Curve Raw Tone Curve The “orig” icon in the toolbar does seem to be a little faster in flicking back and forth, but only between the full stack and the original. Unchecking, for example, the raw processing filter, it flicks back to the previous state quite promptly. But when I then click it on again, it appears to perform the noise reduction again, complete with on-screen progress bar. Something much faster is needed flicking back and forth bewteen two versions of a photo is perhaps the most important performance metric in such a processor, since that’s the primary way of deciding if a setting is right. Ah, but switching from browsing to editing mode is slow. When I select a photo in the filmstrip, it appears in the editing window quite quickly. LightZone editor screen Specific Issues Responsiveness The “zonemapper” function, and the “relighting tool”, look particularly interesting. Regions/masks are all vector, though, you can’t enhance them with bitmap editing, which makes them not up to anything beyond the simplest masking (a bit beyond what an old-style split neutral density filter could handle, but only a bit). There is also a specific clone tool, and a red-eye fixer. LightZone has “regions and masks”, which can be applied to all tools, allowing you to do local adjustments. It also has the blending mode options available. Like DarkTable, LightZone is based on a set of modules that perform different functions, which can be stacked in any order (and instantiated multiple times). If I’m reading the history right, it was a failed commercial product released into the wild.
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