Local Corrections: Fast Brush and Gradient Masks

Local corrections are fastest when you start broad with a gradient to shape light across a large area, then switch to a brush only to “trim” edges, fix overlaps, or target small details. If you’re brushing for anything that could be covered by a clean gradient, you’re usually doing extra work; if you’re trying to force a gradient to fit around complex edges, you’ll waste time fighting halos.

Think in two moves: lay down, then refine

Speed comes from separating the job into (1) a big, simple mask that gets you 80% there and (2) a quick refinement pass that fixes what the big mask can’t. Gradients (linear or radial) are the fastest way to establish a smooth transition—sky vs. land, bright window vs. room, face vs. background light falloff. Brushes are the fastest way to correct exceptions—tree lines cutting into the sky, hair edges, small hotspots, patches of distracting brightness.

This mindset prevents the most common time sink: painting the entire sky by hand when a gradient would have taken two seconds.

Default order: gradient first, brush second

When you’re editing quickly, pick the tool based on the shape of the correction:

Use a linear gradient when the change should fade smoothly in one direction (top-to-bottom sky darkening, bottom-to-top foreground lift, side-to-side window light control).
Use a radial gradient when the change should be strongest in the middle and fade outward (subtle subject emphasis, vignette-like control, lifting a face without touching corners).
Use a brush when the area is small, irregular, or edge-heavy (dodging eyes, reducing a shiny spot on skin, lifting a dark jacket, taming a single bright rock).

A quick test: if you can describe the correction as “more of this up here, less down there,” it’s a gradient. If you describe it as “just that little bit right there,” it’s a brush.

Build “clean” gradients that don’t look like gradients

The fastest local edits are the ones you don’t have to redo. A gradient looks natural when it’s wide enough and aligned to the scene’s lighting logic.

Practical rules:

Make the transition longer than you think. A short gradient creates a visible band. Lengthen it until you can’t spot where it starts.
Align to the dominant plane. Horizons want level gradients; walls want gradients that follow the wall angle; window light often wants a diagonal.
Use small amounts. Local corrections should usually be subtle. If you need a huge change, you may be compensating for a global setting issue—pull the global back into a reasonable range, then local-adjust.

When you’re pressed for time, a long, gentle gradient at low strength beats a short, strong gradient every time.

Brush like a scalpel, not a paint roller

Brushing is slow when you treat it like coloring a page. It’s fast when you treat it like edge control.

What to prioritize:

Brush size: Keep it as large as possible while still respecting edges. Oversmall brushes slow you down.
Softness/feather: Softer edges blend faster and hide minor inaccuracies. Hard edges demand perfection.
Flow/opacity build: Lower flow lets you “sneak up” on the look with a few quick passes instead of undoing heavy strokes.

A fast brushing technique is “two-pass”: first pass loosely covers the target; second pass corrects the border. Don’t aim for perfect coverage on stroke one.

Combine tools: subtract with the brush instead of repainting

The biggest time saver is refusing to start over.

Workflow that stays fast:

Drop a gradient that affects slightly more than you want (it’s quicker to subtract than to thread a perfect line).
Switch to brush subtract/erase and remove the effect from problem edges (tree line, buildings, hair, bright object you want to keep).
Feather the edge with a couple of soft strokes if needed.

This “over-mask then subtract” approach is faster than painting around complex edges from scratch because you’re only brushing the boundary, not the whole area.

Use the mask view as a speed tool, not a precision tool

Mask overlays aren’t just for perfection—they’re for avoiding wasted effort. Toggle the mask view on briefly to answer one question: Did I miss a big chunk or paint somewhere obviously wrong? Then toggle it off and judge the photo normally.

A quick rhythm:

Adjust sliders while looking at the image.
Toggle mask view for two seconds to confirm coverage.
Fix the obvious misses.
Toggle off and move on.

If you stay in mask view too long, you’ll start editing the overlay instead of the photo.

Typical fast scenarios (and the quickest tool choice)

1) Darken a bright sky without muddying the horizon

Linear gradient from the top down, long transition.
Brush subtract along the horizon line where mountains/trees break the edge.
If the sky still looks heavy, reduce the local strength rather than tightening the gradient.

2) Lift a face in shade without brightening the entire frame

Radial gradient centered on the face/upper body, generous feather.
Brush add for small areas that still look too dark (eye sockets, under-hat shadows).
Keep the lift modest; too much local exposure reads as “spotlight.”

3) Reduce a single distraction (bright sign, shiny forehead, reflective rock)

Brush only, medium-soft.
One or two passes at lower flow.
If the distraction is near an edge, zoom in briefly, fix it, zoom back out immediately.

4) Balance a foreground that’s darker than the background

Linear gradient from the bottom up.
If it spills onto the subject, brush subtract off the subject quickly.
Prefer lifting shadows/brightness gently over blasting exposure.

Avoid the three slowest habits

Painting large areas with a brush. If you’re brushing the top half of an image, stop and switch to a gradient.

Chasing perfect edges at 300% zoom. For speed work, zoom only when there’s an obvious halo or a clearly wrong spill. Otherwise, soft masks hide small edge errors at normal viewing size.

Stacking too many local corrections that fight each other. If you need multiple masks to fix the same region, your first mask is probably too strong or poorly shaped. Simplify: one broad gradient + one boundary clean-up brush is usually enough.

A simple “30-second local correction” routine

Use this when you want consistency and speed:

Scan for the biggest imbalance (too bright top, too dark bottom, subject lost, one hotspot).
Choose gradient if it’s broad; brush if it’s tiny.
Apply a small adjustment and immediately decide: better or worse?
Refine edges only if they’re noticeable at normal zoom.
Stop when the viewer’s attention flows correctly, not when the mask is perfect.

This routine keeps local corrections from turning into a perfection project.

Why does this matter

Fast, clean local corrections let you fix the photo’s attention and balance without getting trapped in slow, fussy masking—so you finish more edits with fewer artifacts and less second-guessing.

Sources: