Getting started
Aquarell local colouring: limit brushwork with selections, then understand masks
Use a separate practice image to limit brush marks with a selection, check whether it is still active, and distinguish temporary regions, layer masks and direct erasing.
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For local coloring, decide the area first and the painting method second. Aquarell's public description includes selections and masks. Selections restrict the area affected during an operation; masks control the visible portions of a layer. Understand those two purposes before combining them to avoid losing track of the editing state.
Start with a simple color-block exercise, not your only finished original. Restrict coloring to half the shape with a selection, then compare a mask with direct erasing. Tool names may vary; choose the controls actually available in your version.
1. Prepare a test canvas with an obvious result
Create a 1200 × 1200-pixel canvas with a white background. Paint a blue-green area about 600 × 600 pixels in the center. A hand-drawn square or circle is sufficient; exact geometry is unnecessary. Add an empty layer specifically for local coloring.
Avoid many translucent textures for now. Clear shapes and strongly contrasting colors make it obvious whether strokes are restricted. Note the current layer, confirm it is visible and unlocked, and then open the selection controls.
2. Create a selection that is easy to judge
Open Selection or Selection and Transform, then choose a shape or drawing method you understand in your version. Start by selecting the left half of the color block instead of complex veins or hair. If Draw Selection and Finish Selection appear, finish the area before returning to painting.
Check that the selection covers the intended area, not just a narrow strip or accidentally the entire canvas. If the area is wrong, cancel and rebuild it rather than continuing color tests inside the wrong boundary.
3. Verify the area with a contrasting color
On the empty coloring layer, choose a warm orange and draw a broad stroke across the selection boundary. Check that only the permitted area receives paint. Crossing the boundary tests the restriction more clearly than drawing a small dot in its center.
If no stroke appears, check the layer, color, opacity, and selection location. If paint appears outside the intended area, check whether you are still drawing the selection, whether it has been completed, or whether you opened the wrong tool. Do not assume the mask is broken: this test concerns a selection.
4. Apply local coloring to an actual subject
Once the test works, use the approach for a shadow on one side of a leaf, a band of color across a cup, or a local color area on a card. Keep it on a separate layer, paint a little first, inspect the edges, and then decide whether to add coverage.
A hard selection boundary may produce a hard edge. If your interface offers feathering, try a small amount in a test file and compare the result. If that control is absent, use lighter strokes or reposition the boundary. Do not assume an advanced setting necessarily exists.
5. Deselect before continuing elsewhere
After local coloring, use the current version's cancel, clear, or deselect command and confirm that the selection boundary is gone. Make a small stroke elsewhere to check that the normal painting area is restored.
It is easy to forget an active selection. Even after changing layers or colors, strokes may still be restricted. If the brush suddenly appears unresponsive, check for an active selection before repeatedly changing brushes.
6. Explore masks in a separate copy
In a saved test copy, find the layer-mask controls. If Add Layer Mask is available, create one as instructed and confirm whether you are editing the layer's content or its mask. Change only a small area first and observe whether you are changing visibility or the actual color content.
A mask is not simply another layer to color freely. Editing it may hide or reveal content; follow the interface's description of its controls. Do not repeatedly try Apply or Remove without understanding them: some actions bake the visible result into the content. Keep a native copy, then observe changes one at a time.
Completion checks and returning to normal painting
After testing, clear the selection and return the editing target to the content layer you intend to paint. Compare before and after: did the subject's color change unexpectedly, and are the hidden areas correct? Save an annotated practice document so you can revisit the distinction later.
In finished work, use the simplest method that controls the area. If ordinary layers and a small brush suffice, do not add a complicated mask. Consider a mask when the visible region needs repeated adjustment. Tools should make revision easier, not create confusing states.
Questions and limitations
Are selections and layer masks the same thing?
No. A selection defines the current working area; a mask controls which parts of a layer are visible. They may work together, but similar-looking boundaries do not mean identical saving or editing behavior.
Why can I still not paint after changing the color?
Check the active selection, layer locking and visibility, and whether you are editing a mask. Restore a state you understand, then test with one stroke rather than changing many settings at once.
Does removing a mask restore the original?
That depends on whether the operation removes, applies, or otherwise processes the mask. Read the interface explanation, test on a copy, and keep an editable native file. A single button action is not a reliable backup.
Can it automatically select a complex person outline?
This guide covers only publicly supported selection and mask basics. It does not verify or promise automatic subject recognition or intelligent hair cutouts. Handle complex edges gradually with the actual tools and source image.
Sources and applicable version
Information checked on October 22, 2026, for Aquarell 1.0.5 (iOS / iPadOS 15.0 or later). See the official description and Apple release lookup; the interface may change with the version.