Why Underwater Is Different #6: Masking Fixes Local Problems, Not the Whole Image

Masking works best after the global underwater Lightroom workflow is complete. Use it to solve specific local problems, not to rebuild the entire photo.

Masking is one of the most powerful and versatile tools in Lightroom, offering photographers a wide range of creative possibilities. 

However, it’s also surprisingly easy to overuse, especially for underwater photographers who often work with complex and vibrant scenes. 

Once you realize that Lightroom can select specific subjects, isolate parts of the background, darken or brighten particular areas, add detail to a fish, soften water effects, or guide the viewer’s eye through the image, it becomes tempting to apply masks everywhere. 

But here’s an important point to keep in mind: if the overall image is still flawed or not quite right, masking alone won’t fix those fundamental issues. 

Overusing masks can actually complicate your edit, making it look heavier or less natural. It might even obscure the actual problem instead of solving it, leading to a less authentic and more artificial appearance. 

The key is to use masking thoughtfully and sparingly, ensuring it enhances your photo without masking over underlying issues.

That is why masking belongs later in the underwater Lightroom workflow.

The sequence still matters:

White Balance → Exposure → Presence → Color → Masking → Final Adjustments

In the last article, we talked about why Color Comes After Structure. Color should not be used to rescue an image that has not already been balanced, shaped, and controlled.

Masking works the same way.

Masking should refine an underwater photo. It should not be responsible for building the entire edit.

The Common Masking Mistake

Many underwater photographers start masking too early.

They open an image that looks flat, blue, green, dull, or hazy, and instead of fixing the global foundation first, they begin creating masks.

They mask the subject.

They mask the water.

They mask the coral.

They mask the sand.

They mask the diver.

They mask the background.

They brighten one area, darken another, add clarity here, reduce haze there, increase saturation elsewhere, and before long, the photo becomes a collection of separate adjustments fighting one another.

The image may look edited, but it does not look better.

This usually happens because the photographer is trying to solve a global problem with a local tool.

Masking should refine specific local problems after the global edit is complete. It should not replace white balance, exposure, presence, and color corrections.

That is the key difference.

A global problem affects the whole image.

A local problem affects one specific area.

If the whole photo has the wrong white balance, that is a global problem.

If the whole photo is too dark, that is a global problem.

If the whole photo lacks structure, that is a global problem.

If the color does not feel believable anywhere in the frame, that is a global problem.

Masking is not the best first answer to those problems.

Masking is for specific local problems after the global workflow has done its job.

Backscatter Is a Local Problem

One of the clearest examples of a local underwater problem is backscatter.

Backscatter is one of the most common frustrations in underwater photography. Small particles in the water catch light from your strobes, video lights, or even strong natural light. They show up as bright dots, specks, haze, or cloudy distractions across the image.

The mistake many underwater photographers make is trying to fix backscatter globally.

They lower clarity across the whole image.

They reduce texture everywhere.

They soften the photo.

They darken the water.

They push dehaze, contrast, or noise reduction, hoping the particles will disappear.

But backscatter is rarely a whole-image problem.

It is usually a local cleanup problem.

If a few bright spots are pulling attention away from the eye of a fish, the face of a turtle, the body of a nudibranch, or the outline of a diver, those spots need careful local work. That may mean using Lightroom’s Remove tool, healing, cloning, or a selective mask to clean the area without damaging the rest of the image.

The goal is not to remove every particle in the water.

The goal is to remove the distractions that compete with the subject.

That is exactly why masking matters underwater.

Masking lets you work on the problem area without changing the whole photo. Backscatter near the subject needs attention. Tiny particles in distant open water may not.

The question is not:

“How do I make the entire image cleaner?”

The better question is:

“What is distracting from the subject?”

That is the masking mindset.

You are not asking Lightroom to fix the whole image.

You are asking it to solve the specific area that is distracting from the subject.

Where Masking Belongs in the Workflow

This series is built around one simple idea:

Underwater editing is different because water changes everything.

It changes color.

It changes contrast.

It changes clarity.

It changes exposure.

It changes how light falls across the scene.

That is why underwater photos need a workflow, not random adjustments.

The order matters:

White Balance → Exposure → Presence → Color → Masking → Final Adjustments

By the time you reach masking, the image should already have a basic foundation.

White Balance should have removed the worst color cast and helped the image feel more believable.

Exposure should have given the photo a controlled tonal structure.

Presence should have added clarity, texture, or dehaze carefully, without making the water look harsh.

Color should have been adjusted after the image had structure, not before.

Only then should masking come in. At that point, you are no longer asking Lightroom to fix the whole image. You are asking Lightroom to help you solve specific local problems.

Get the global workflow right first, then use masking to fine-tune specific local problems.

That is a completely different mindset.

Why Underwater Masking Is Different

Masking is used in many types of photography, but the reason we use it underwater is different.

In landscape photography, masking is often used to balance the sky, foreground, and light direction.

In portrait photography, masking is often used to control skin, eyes, background separation, and face lighting.

In architecture photography, masking is often used to manage windows, walls, room balance, and straight lines.

Underwater photography has a different set of problems.

We are dealing with water.

We are dealing with depth.

We are dealing with lost reds, oranges, and yellows.

We are dealing with blue or green color casts.

We are dealing with suspended particles.

We are dealing with uneven strobe coverage.

We are dealing with subjects that may be only partly lit.

We are dealing with backgrounds that can be too bright, too hazy, too blue, too green, or too distracting.

That means underwater masking should be used with a very specific purpose.

It is not about making the photo look dramatic just because we can.

It is not about forcing the subject to pop unnaturally.

It is not about turning every turtle, fish, diver, coral head, wreck, or sponge into a separate edit.

It is about solving the local problems that remain after the main workflow is complete.

The Question to Ask Before Creating a Mask

Before you create a mask, ask this question:

What specific local problem am I trying to solve?

That question will save you from overediting.

Good answers sound like this:

“The turtle needs a little more separation from the blue water.”

“The diver’s face is too dark.”

“The coral in the lower corner is pulling too much attention.”

“The background is too bright and competes with the subject.”

“The wreck has detail, but one section needs a little more definition.”

“The strobe created a hot spot that needs to be controlled.”

Those are local problems.

A mask can help.

Poor answers sound like this:

“The whole image still looks wrong.”

“The color feels off.”

“The photo still looks flat.”

“I want it to look more dramatic.”

“I am hoping masking will fix it.”

Those are warning signs.

If the whole image still feels wrong, go back to the earlier steps.

• Check White Balance.
• Check Exposure.
• Check Presence.
• Check Color.

Do not ask masking to do the job of the global workflow.

What Masking Is Good For

Masking is excellent when it is used with restraint.

A good mask should guide the viewer’s eye without calling attention to itself.

The viewer should notice the subject, not the edit.

Here are some of the best uses for masking in underwater Lightroom editing.

1. Brightening the Main Subject

Sometimes the overall exposure is correct, but the main subject still needs a little help.

Maybe the turtle is slightly darker than the water around it.

Maybe the fish is well composed but does not quite stand out.

Maybe the diver is placed nicely in the frame, but the face or body is slightly underexposed.

This is where a subject mask, brush mask, or carefully placed radial mask can help.

The goal is not to make the subject glow.

The goal is to gently guide attention.

Small adjustments usually work best.

A slight lift in Exposure, Shadows, or Whites may be enough.

If you push too hard, the subject will look pasted onto the background instead of belonging in the water.

Underwater images need believable light.

Masking should respect that.

2. Adding Detail Without Damaging the Water

One of the biggest underwater editing mistakes is adding too much global clarity, texture, or dehaze.

That can make the subject look sharper, but it can also make the water look dirty, noisy, or crunchy.

This is especially true in blue water, green water, or scenes with suspended particles.

Masking gives you a better option.

Instead of adding texture or clarity to the whole image, add it only where it helps.

That might be the shell of a turtle, the eye of a fish, the surface of a coral head, or part of a wreck.

This is a perfect example of why masking comes after the global workflow.

You first build the image globally.

Then you use a local mask to add detail only where detail matters.

3. Reducing Background Distractions

Not every mask needs to be made stronger.

Sometimes masking is used to make something less distracting.

That can be just as important.

A bright patch of sand may pull attention away from the subject.

A background coral head may be too saturated.

A sunlit area may compete with the main animal.

A section of water may be too bright or too contrasty.

In those cases, a mask can help reduce the distraction.

You might lower Exposure slightly.

You might reduce Highlights.

You might soften Texture or Clarity.

You might reduce Saturation.

The goal is not to make the background obvious.

The goal is to help the subject become more obvious.

That is a subtle but important difference.

4. Controlling Uneven Strobe Light

Underwater lighting is rarely perfect.

Even with good strobe placement, you may have uneven light across the frame.

One side of the coral may be brighter than the other.

A fish may be partly lit and partly shaded.

A foreground area may be too hot because it was closer to the strobe.

A background area may fall off too quickly into darkness.

Masking can help smooth those problems.

But again, it should not replace the global edit.

First, set the overall exposure and tone.

Then use masks to control the specific areas that still need attention.

This keeps the image natural.

It also prevents the edit from becoming a fight between too many disconnected adjustments.

5. Creating Subject Separation

One of the biggest challenges underwater is separation.

Subjects can blend into the water.

Blue fish can blend into blue water.

Green turtles can blend into green backgrounds.

Divers can blend into wrecks, reefs, or shadows.

Masking can help separate the subject from the scene.

But separation does not always mean making the subject brighter.

Sometimes it means slightly darkening the background.

Sometimes it means adding a little texture to the subject.

Sometimes it means reducing saturation behind the subject.

Sometimes it means gently warming the subject while keeping the water believable.

The best separation is subtle.

The viewer should feel drawn to the subject without feeling like the edit is shouting at them.

What Masking Should Not Do

Masking should not become a rescue tool for every problem.

It should not fix bad white balance.

If the whole image is too blue or too green, fix that globally first.

It should not rescue poor exposure structure.

If the overall image is too dark, too bright, or tonally flat, fix Exposure before masking.

It should not create fake color.

If the colors are not believable globally, masked saturation will often make them worse.

It should not replace thoughtful Presence adjustments.

If the whole image feels hazy, do not start painting clarity everywhere. Work through the proper order first.

It should not become a way to overprocess the subject.

A fish, turtle, diver, or coral head should still look like it belongs underwater.

The goal is not to make underwater images look like studio portraits or dry land landscapes.

The goal is to reveal what was there in a believable way.

Example 1: Turtle Against Blue Water

Imagine a turtle swimming through blue water.

The original image looks flat and slightly blue.

The turtle is visible, but it does not stand out.

The wrong approach is to immediately mask the turtle and push Exposure, Clarity, Texture, Saturation, and Sharpness until it pops.

That might create impact, but it often looks unnatural.

The better approach is to follow the workflow.

1. First, correct White Balance so the overall color feels more believable.
2. Then set Exposure to give the image a better tonal foundation.
3. Then use Presence carefully to add structure without making the water harsh.
4. Then adjust Color so the turtle and water feel natural.

Only then create a mask for the turtle.

At that point, the mask may need very little.

Maybe a slight Exposure lift.

Maybe a small Texture increase.

Maybe a tiny adjustment to warmth or saturation.

Because the global workflow already did the heavy lifting, the mask only needs to refine the image.

That is how masking should work.

Example 2: Coral Scene with Uneven Strobe Light

Now imagine a reef scene where one part of the coral is nicely lit, but another part is too bright because it was closer to the strobe.

The wrong approach is to darken the whole image.

That may control the hot spot, but it can make the rest of the photo too dark.

A better approach is to finish the global workflow first.

Once the overall image looks balanced, create a mask for the bright coral area.

Lower Highlights or Exposure slightly.

Maybe reduce Saturation if the color became too intense.

The mask solves the local problem without damaging the whole photo.

That is exactly where masking shines.

Example 3: Diver Near a Wreck

Now imagine a diver near a wreck.

The overall scene has mood and structure, but the diver is slightly too dark.

If you raise global exposure, the water and wreck may become too bright.

If you add global clarity, the water may become harsh.

If you increase global saturation, the entire scene may become unrealistic.

Masking lets you solve the real problem.

Mask the diver.

Lift Shadows slightly.

Add a touch of Texture or Clarity if needed.

Maybe warm the diver just enough to separate them from the background.

The rest of the image stays controlled.

The diver becomes easier to see.

The edit remains believable.

That is the point.

Keep the Mask Simple

One of the best ways to improve your masking is to use fewer masks.

More masks do not automatically mean a better edit.

In fact, too many masks can make the image feel disconnected.

The subject may look like it belongs to one edit.

The background may look like it belongs to another.

The water may look artificial.

The coral may look oversaturated.

The viewer may not know why the image feels wrong, but they will feel it.

When you use a mask, keep it simple.

Ask what problem you are solving.

Make the smallest adjustment that solves it.

Turn the mask off and on to compare.

If the mask is obvious, reduce it.

If the image looks better but still natural, you are probably on the right track.

The Best Mask Is Often the One You Barely Notice

This is one of the most important lessons for Oceanic Explorers.

A strong underwater edit does not need to announce every adjustment.

You do not want the viewer to think, “That is a strong mask.”

You want them to think, “That is a beautiful turtle.”

Or, “That diver really stands out.”

Or, “That wreck has great mood.”

Or, “That reef feels alive.”

The edit should support the experience, not overpower it.

This is why masking comes near the end of the workflow.

By the time you get there, the image should already be working.

Masking should make it more focused, more intentional, and more polished.

It should not be the reason the image works at all.

A Simple Masking Checklist

Build the image globally first, then use masks to refine specific local problems and polish the final result.

Before you create a mask, ask:

1. Have I corrected White Balance first?

2. Have I set the global Exposure and tone?

3. Have I controlled Presence without making the water harsh?

4. Have I adjusted Color after the image has structure?

5. Can I name the specific local problem I am trying to solve?

6. Is there distracting backscatter near the subject that needs local cleanup?

7. Will this mask make the image more natural and focused?

8. Will the viewer notice the subject more than the edit?

If the answer to those questions is yes, masking is probably the right next step.

If the answer is no, go back to the workflow.

The Big Takeaway

Masking is powerful.

But it is not the underwater Lightroom workflow.

Masking is what you use after the workflow has done its job.

White Balance gives the image a believable color direction.

Exposure gives the image structure.

Presence adds controlled depth and detail.

Color refines the image after the structure is in place.

Then masking solves the specific local problems that remain.

That is the difference between editing with intention and chasing problems around the screen.

For underwater photographers, this matters because our images already face extra challenges: color loss, haze, uneven light, backscatter, depth, distance, and water between the camera and the subject.

If you start masking too early, you usually create more work.

If you mask at the right time, you edit faster, stay more consistent, and create images that feel natural instead of overprocessed.

So the next time you reach for a mask, pause for one moment and ask:

Is this a global problem or a local one?

If it is global, go back to the workflow.

If it is local, masking may be exactly the right tool.

That simple decision will make your underwater edits cleaner, stronger, and more believable.

Keep Learning

If you are following the full Why Underwater Is Different workflow, you can review the earlier steps here: White Balance Must Come First, Exposure Depends on White Balance, Presence Should Not Come First, and Color Comes After Structure.

The workflow is:

White Balance → Exposure → Presence → Color → Masking → Final Adjustments

If you want more practical Lightroom help, subscribe to the weekly Robert Herb Photography blog, watch the companion video on YouTube, and download my free guide, 10 Lightroom Fixes Every Underwater Photographer Should Know.

And when you are ready to go deeper into the complete underwater editing process, the Structure Before Drama Masterclass and Underwater Lightroom Mastery Cohort are designed to help you build a repeatable workflow instead of guessing your way through every image.

Until next time, dive smart, shoot with intention, and remember:

Masking is not the shortcut.

Masking is the refinement.