MintGradeA mask limits an adjustment to part of a photo. Its quality depends on both the selection and the edge transition: a mask that is too broad changes unrelated objects, while a hard edge can look pasted on.
Start: Define the object or color range you want to isolate.Check: Inspect edges at full size and look for spill in nearby regions.
Focus onA practical workflow
- 1. Choose a clear target and start with the simplest selection method.
- 2. Subtract obvious spill and refine edges around hair, branches or fine detail.
- 3. Feather the boundary enough to match the softness of the real light.
- 4. Toggle the mask and inspect nearby objects as well as the target.
Color-based selections can include different objects that share the same hue; shape-based selections can miss fine or transparent edges. Combine methods only when the first result shows a specific problem, and keep the original visible for comparison.
Refine the boundary before strengthening the edit
A mask is not just inside or outside. Soft transitions help a local exposure or color change blend with the scene, but excessive feathering can spill over a wide area. Inspect both the subject boundary and the region immediately beside it.
When a mask catches part of the background, reduce the range or subtract that region rather than lowering the entire adjustment. For hair, foliage or translucent detail, a slightly imperfect but soft transition can look more believable than a hard cutout.
Inspect the edge at full size
Toggle the mask while checking hair, branches or the edge of a colored object. Look for halos and spill, then inspect the whole frame. Refine the boundary before increasing adjustment strength.
Fix the selection before adding strength
If the boundary is visible, refine the mask first. Increasing adjustment strength makes edge mistakes more obvious. If selection spill persists because two objects share a color, use a different selection method for that part.
If the selection spills beyond the target
First decide whether the spill comes from a shared color or a weak boundary. A shared hue may need a different selection method; a rough edge may need refinement or a softer transition. Avoid hiding the mistake by weakening the entire adjustment if the target itself is correct. Check the mask at high magnification and again at fit view, since each reveals a different kind of edge problem.
Common mistakes
- Using a broad color selection on several objects with the same hue.
- Hardening the edge until the adjustment looks cut out.
- Feathering so much that the correction spreads beyond its target.
- Judging the mask only when zoomed in or only at fit view.
Questions people ask
Why does a local mask look unnatural?
The boundary may be too hard, too soft or include neighboring colors. Inspect the edge and the adjacent area, refine the selection, and keep the adjustment subtle enough to fit the scene.
Should I use a color mask or a brush?
A color mask can quickly select repeated hues; a brush gives direct control over a specific object. Use whichever makes the cleaner boundary, then refine only where the first result falls short.
Try the workflow in MintGrade
MintGrade includes browser-local exposure controls, HSL, curves, color wheels, .cube LUT support, scopes, range masks, reference matching and tiled full-resolution export for browser-decodable images. The editor is designed so you can keep the image visible while adjusting it.