How to make line art in Procreate without wobbly strokes

Almost every beginner who opens Procreate runs into the same three problems: shaky lines, line weight that changes randomly, and fuzzy or pixelated edges after export. The good news is that none of these are talent problems. They are settings problems, and they can all be fixed in a few minutes.

This tutorial walks through the exact brush choices, stabilization values, shape tools and export settings we use at Kyanite Studios to produce inking that stays sharp at print size. Follow it in order and you will have a repeatable line art workflow by the end of the page.

Step 1: Set up a canvas that can survive export

Pixelated edges almost always start here, not at the brush. Procreate is a raster app, so your line art can only be as sharp as the pixel grid you drew it on. If you draw on a screen-sized canvas and then export for print, every line turns into mush.

Create your canvas with Actions (wrench) > Canvas > Custom Canvas and use these starting points:

Use case	Dimensions	DPI	Note
Web illustration / social	3000 x 3000 px	150	Plenty of layers, downscales cleanly
A4 print / poster	2480 x 3508 px	300	Standard A4 at print resolution
Comic page	2550 x 3900 px	350	Includes bleed margin
Tattoo / sticker / logo-style line art	4000 x 4000 px	300	Scales down for any format later

Golden rule: always draw bigger than you need and scale down. Scaling down sharpens lines. Scaling up destroys them.

Watch the Maximum Layers counter in the Custom Canvas panel. Huge canvases on older iPads leave you with very few layers, which is a bad trade for line art that usually needs at least 5 to 10 layers.

Step 2: Pick the right brush for crisp lines

Not all Procreate brushes are built for inking. Textured and grainy brushes look lovely at 100% zoom, then fall apart when you export or fill them with colour. For line art you want brushes with hard edges, minimal grain and predictable pressure response.

Best built-in Procreate brushes for line art

Brush	Set	Edge quality	Best for
Technical Pen	Inking	Very crisp, near-uniform width	Technical drawing, patterns, mandalas, logos
Studio Pen	Inking	Crisp with smooth taper	All-round illustration inking, the safest default
Syrup	Inking	Crisp, strong pressure response	Expressive comic and manga lines with thick-thin flow
Dry Ink	Inking	Slightly textured edge	Hand-drawn feel, hatching, rough inking
Monoline	Calligraphy	Perfectly uniform	Flat-style icons, lettering outlines, blueprint art
Gel Pen	Inking	Smooth, slightly soft	Sketch-to-ink transitions, casual line work

If you only remember one thing: start with Studio Pen for character work and Technical Pen for geometric work. Everything else is a stylistic variation.

Brush size and the pixel-edge trap

A brush under roughly 2 to 3 px on a large canvas will render with visible stair-stepping and may look patchy where strokes overlap. On a 3000 px canvas, keep inking brushes between 6 and 25 px depending on hierarchy. Use the sidebar slider, then tap and hold the slider value to lock it at a precise percentage.

Step 3: Tune StreamLine stabilization for your stroke speed

This is the single biggest fix for wobbly lines. Open the brush you want to use (tap it twice to enter Brush Studio), then go to the Stabilization tab. You get three independent tools:

• StreamLine: pulls the stroke towards a smoothed path while you draw. Great for long, flowing curves. Higher values create a slight “lag” behind the Pencil tip.
• Stabilization: dampens small jitter without reshaping the whole stroke. Better for short, controlled strokes and hatching.
• Motion Filtering: smooths the overall motion path. Useful for slow, deliberate drawing, but too much makes strokes feel mushy.

Recommended StreamLine values by stroke style

Stroke style	StreamLine amount	Stabilization	Why
Fast, swept strokes from the elbow	10% to 25%	0% to 10%	Speed already smooths the line, heavy StreamLine would overshoot corners
Medium-speed character inking	25% to 45%	10% to 20%	The sweet spot for most illustration work
Slow, careful curves (hair, fabric, calligraphy)	50% to 70%	15% to 25%	Removes micro-tremor that slow strokes expose
Very long single-pass contours	70% to 85%	20% to 30%	Behaves almost like a vector pen, expect visible lag
Detail work, eyelashes, cross-hatching	0% to 15%	0%	You need the line to end exactly where the tip is

Do not push StreamLine to 100%. Above roughly 85% the brush stops following tight corners, taper becomes unpredictable, and sharp intersections round off. If a value feels laggy, lower it by 10% and test again on a scratch layer.

The StreamLine Pressure slider

Under the StreamLine amount there is a Pressure slider. It smooths pressure data, not position. Raise it to about 20% to 40% if your line weight flickers mid-stroke because of inconsistent hand pressure. This is a direct fix for uneven line weight.

Save your settings as a custom brush

Never edit a default Procreate brush directly. Swipe left on the brush, tap Duplicate, rename it something like “Studio Pen 40 SL”, then edit the copy. Build a small set of 3 or 4 inking brushes with different StreamLine values and swap between them instead of re-opening Brush Studio mid-drawing.

Global smoothing in Preferences

There is also an app-wide setting at Actions > Prefs > Pressure & Smoothing. Set the pressure curve to suit how hard you naturally press. If your lines go black too quickly, flatten the curve. Leave global smoothing low and control smoothing per brush instead, so your pencil sketching stays responsive.

Step 4: Build consistent line weight

Clean line art is not just smooth, it is hierarchical. Flat, uniform lines everywhere read as amateur because nothing separates the subject from the detail.

1. Outer silhouette: thickest line, roughly 100% of your base brush size.
2. Major internal forms (limbs, folds, large shapes): around 70% of base size.
3. Interior detail (texture, small folds, facial detail): around 40% to 50%.
4. Shadow-side lines: thicken lines where form turns away from the light, thin them on the lit side.

Two technical helpers:

• Taper settings: in Brush Studio > Taper, set a small pressure taper on both ends (around 10% to 20%) so strokes start and end with a point instead of a blunt stub.
• Separate layers: keep outline and detail on different layers. If the weight balance is wrong, you can scale or re-ink one layer without redrawing everything.

If you own an Apple Pencil Pro, barrel roll lets you vary width by rotating the pencil on brushes that respond to tilt. It is a nice extra, but pressure and brush hierarchy still do 90% of the work.

Step 5: Perfect curves with QuickShape

QuickShape turns a rough stroke into a mathematically clean shape. It is the fastest way to get consistent arcs, circles and straight lines.

How to use QuickShape

1. Draw the line, arc, circle, rectangle or triangle in one stroke.
2. Hold the Pencil on the canvas at the end of the stroke without lifting. Procreate snaps it into a clean shape.
3. While still holding, place a second finger on the screen to constrain it: perfect circle, perfect square, or a line locked to 15 degree increments.
4. Tap Edit Shape at the top of the screen to drag the blue nodes and fine-tune the curve.

QuickShape tips most tutorials skip

• Draw a loose arc and hold to get a clean curve with adjustable nodes. This is how you ink smooth hair strands and mechanical curves without a steady hand.
• Build complex curves from two or three QuickShape arcs on the same layer, then erase the overlapping ends.
• If QuickShape triggers when you do not want it, shorten the hold or adjust the delay in Prefs > Gesture Controls > QuickShape.

Step 6: Keep everything aligned with Drawing Guides

For symmetrical, architectural or pattern-based line art, the Drawing Guide does the heavy lifting.

Go to Actions > Canvas > Drawing Guide, turn it on, then tap Edit Drawing Guide. You get four modes:

Guide	What it does	Use it for
2D Grid	Snaps strokes to horizontal and vertical	Panels, UI mockups, lettering, patterns
Isometric	Snaps to 30 degree axes	Game assets, isometric rooms, packaging art
Perspective	1, 2 or 3 vanishing points with snapping	Backgrounds, architecture, comic environments
Symmetry	Mirrors strokes vertically, horizontally, quadrant or radial	Faces, mandalas, ornaments, logos

Important: the guide only snaps your strokes if Assisted Drawing is enabled on that specific layer. Tap the layer, then choose Drawing Assist. The word “Assisted” appears under the layer name when it is active.

For symmetry work, enable Rotational Symmetry in the guide settings to mirror rather than rotate, which is what you want for faces and front-facing objects.

Step 7: Clean up before you colour

A few finishing moves separate decent line art from professional line art:

• Close every gap. Zoom in and check line intersections. Any gap will leak when you use ColorDrop. Adjust ColorDrop Threshold by dragging after the drop if small leaks still happen.
• Delete the sketch layer or set it to zero opacity, do not just dim it. Faint sketch pixels show up after export.
• Use Alpha Lock on the line layer to recolour your lines without touching the shapes. Tap the layer and choose Alpha Lock, or swipe right with two fingers.
• Erase with the same brush you inked with. A soft airbrush eraser leaves semi-transparent fuzz on hard lines.
• Flip the canvas (Actions > Canvas > Flip Horizontal) to catch asymmetry your eye has stopped noticing.

Step 8: Export without pixelated edges

The last place clean line art dies is at the export screen. Go to Actions > Share and choose carefully:

Format	Use when	Avoid when
PNG	Line art with transparency, web upload, client proofs	File size is critical
TIFF	Print delivery, maximum quality	Sharing online
PSD	Handing layered files to a colourist or studio	Final delivery to a client who has no Photoshop
JPEG	Quick previews only	Any final line art, compression creates grey halos on black lines

Three rules that solve most export complaints:

1. Never export JPEG line art. Compression artefacts appear exactly where you have high contrast, which is every line you drew.
2. Never upscale after export. If you need bigger, go back to Procreate and redo it on a larger canvas, or vectorise it in a vector app.
3. Check at 100% zoom, not fit-to-screen. The canvas preview applies screen smoothing that hides jagged pixels.

If you genuinely need infinitely scalable line art (logos, signage, die-cut stickers), export a high-resolution PNG and run an image trace in a vector program. Procreate itself stays raster.

Troubleshooting: the three most common line art problems

Symptom	Likely cause	Fix
Wobbly, shaky strokes	StreamLine too low, drawing from the wrist, drawing too slowly	Raise StreamLine to 30% to 50%, zoom out, draw from the elbow in one confident pass
Line weight changes randomly	Pressure curve too steep, pressure jitter, textured brush	Raise StreamLine Pressure to 30%, flatten the curve in Prefs, switch to Monoline or Technical Pen
Jagged or blurry edges after export	Canvas too small, brush size under 3 px, JPEG export, upscaling	Redraw at 300 DPI, keep brushes above 4 px, export PNG or TIFF
Colour leaks past the lines	Gaps in the outline or low ColorDrop threshold	Close gaps, hold after ColorDrop and drag right to raise threshold
Strokes lag behind the Pencil	StreamLine above 80%, very large brush, very large canvas	Drop StreamLine to 40% to 60% and reduce canvas DPI if needed

A 10 minute practice routine that actually works

Settings fix half the problem. Muscle memory fixes the other half. Before each session:

1. Open a blank canvas and draw 20 long horizontal lines from the elbow, StreamLine at 0%.
2. Draw 15 overlapping circles in one pass each, no QuickShape.
3. Draw 10 S-curves and 10 tapered strokes, focusing on lifting pressure at the end.
4. Repeat the same exercise with StreamLine at 40% and feel the difference in control.

Also get into the habit of rotating the canvas with two fingers so every stroke is drawn in your most comfortable direction, usually pulling toward your body rather than pushing away.

FAQ: line art in Procreate

How do I convert a photo into a line drawing in Procreate?

Import the photo with Actions > Add > Insert a photo. Lower its opacity to about 30%, add a new layer above it, and trace the forms with an inking brush. For a quicker automated look, duplicate the photo layer, desaturate it (Adjustments > Hue, Saturation, Brightness), invert the copy, set the blend mode to Color Dodge and apply a Gaussian Blur until the edges emerge. Manual tracing still gives far better results for anything you plan to publish or print.

What is the best Procreate brush for line art?

Studio Pen is the best all-round choice, Technical Pen is the crispest for geometric and technical work, and Syrup gives the most expressive thick-to-thin comic lines. Duplicate whichever one you pick before changing its settings.

What StreamLine percentage should I use?

Most illustrators sit between 25% and 45%. Go higher for slow, long curves and lower for fast strokes and fine detail. Anything above 85% starts cutting corners and feels laggy.

How do I add a perfect shape in Procreate?

Draw the shape in one stroke, hold the Pencil on the canvas at the end, and Procreate snaps it with QuickShape. Add a second finger to constrain it to a perfect circle, square or straight line, then tap Edit Shape to adjust the nodes.

How do I select only part of a drawing?

Tap the Selection tool (S icon) and choose Freehand, Rectangle, Ellipse or Automatic. Automatic selects contiguous areas, which is ideal for picking out a region enclosed by line art. Drag left or right after tapping to adjust the selection threshold.

How do I colour only inside the lines?

There are three reliable methods: use ColorDrop on a closed shape, create a new layer below your line art and use a Clipping Mask over a base silhouette, or enable Alpha Lock on a filled layer so new strokes stay inside existing pixels.

Can I make my Procreate line art vector?

Not inside Procreate, which is raster only. Export a high-resolution PNG and run it through an image trace in a vector application if you need infinite scaling.

Final takeaway

Clean line art in Procreate comes down to four controllable variables: a large enough canvas, a hard-edged inking brush, StreamLine tuned to your stroke speed, and lossless export. Add QuickShape and drawing guides for the parts your hand cannot keep consistent, and the wobble problem disappears for good.

Build your own set of 3 or 4 custom inking brushes with different StreamLine values this week, and you will never have to dig through Brush Studio mid-drawing again.