How to Sculpt Hair in 3D: Clumps, Flow and Strands

Hair is where a lot of good character sculpts fall apart. The face is right, the proportions hold, and then the head gets a helmet of scribbled grooves that reads as neither hair nor clay. This guide is the approach that works for sculpted hair — the kind you print, render as a statue, or bake into a game model — rather than simulated strands. Disclosure up front: Re:Form is our browser sculpting tool and supplies the examples, but the method is the same in ZBrush, Blender, and Nomad Sculpt.

How do you sculpt hair in 3D?

You sculpt hair as a few large solid masses, not as strands. Block the overall silhouette first, split it into five to fifteen clumps, give each clump a direction, and only then cut flow lines inside the clumps. In Re:Form that means Blockout or Clay for the mass, Crease and Carve for the splits, and Rake for the surface flow.

That order mirrors how traditional sculptors handle hair in marble or bronze. Nobody carves individual hairs into stone; they carve shapes that catch light the way hair does. A viewer's eye fills in the strands. The fastest way to make a sculpt look amateur is to skip straight to that fill-in step and carve lines into a smooth dome.

Sculpted hair vs. hair systems

There are two different things people mean by "3D hair," and it's worth knowing which one you want before you start.

Hair systems generate thousands of thin curves or fibers that renderers draw as real strands. Blender has had a dedicated Curves Sculpt mode for this since version 3.3 — its manual describes it as "commonly used for hair grooming" — with brushes like Comb, Add, Delete and Snake Hook that act on curves rather than on a surface. ZBrush's equivalent is FiberMesh, which Maxon's documentation says creates real fiber geometry "on the fly" as a separate SubTool, groomed with dedicated brushes (both verified as of September 2026).

Sculpted hair is part of the surface: solid, carved form. It's what you want for 3D printing, miniatures, stylized characters, statues, busts, and any game asset where the hair will be baked into a normal map or kept as a solid mesh.

Re:Form does sculpted hair only. It has no strand or fiber system, so if you need a realistic groom for a render, Blender's curve hair is the right tool and it's free. Everything below is about the sculpted kind.

Step 1: Block the silhouette

Start with the overall shape the hair makes against the background — from the front, the side, and above. Hair adds far more volume to a head than beginners expect, especially on top and at the back. A haircut that sits flush against the skull reads as a swim cap.

Two ways to get the mass in:

• Build it on the head. Clay in broad strokes over the skull, then Grab to push the silhouette out where the hair lifts off. Smooth with Shift as you go. This suits short and close-cropped hair.
• Draw it with Blockout. Re:Form's Blockout tool lays strokes of volume that melt together where they meet, and it can land them on another layer's surface. Put the hair on its own Blockout layer over a finished head, draw the main masses as fat strokes, and press Finish to turn them into one mesh. This suits long hair, ponytails and anything that leaves the skull.

Keep the head and hair on separate layers either way. You'll want to hide the hair to check the skull underneath, and a separate hair layer can be reworked without touching the face. The sculpt layers explainer covers how layers behave.

Before moving on, check the hairline against the skull. It sits roughly halfway between the brow and the top of the head, and the hair mass should start there with some thickness rather than feathering to nothing — the head sculpting guide has the rest of the proportion landmarks.

Step 2: Split the mass into clumps

This is the step that turns a helmet into hair. Look at reference and find the big locks: the fringe, the part, the sections over each ear, the fall at the back. Most hairstyles break into somewhere between five and fifteen primary clumps.

Cut the boundaries between them with Crease, which carves a V-section line and pinches its sides in as it goes, so the gap between two clumps tightens the way real hair does where locks separate. Follow a first Crease pass with Pinch along the same line to draw it tighter, and use Ctrl-Crease to raise a ridge where a lock rolls over another.

Then shape each clump as a form in its own right. A lock of hair is thickest in the middle and thins toward its tip and its edges, like a flattened leaf. Clay the belly of each clump, Flatten or Scrape its edges if the style is sleek, and let the tips overlap the clump beneath them. Overlap is what gives hair depth — a set of clumps that all sit at the same height reads as a textured cap.

Symmetry is useful for blocking a parted or symmetric cut, but turn it off before this step is done. Almost no hairstyle is mirror-symmetric, and an exactly mirrored fringe is one of the fastest tells of a 3D model.

Step 3: Give every clump a direction

Hair has flow: it grows out of the scalp from a crown whorl, falls with gravity, and curls where the style says it curls. Every clump you made in Step 2 should point somewhere, and the lines you cut next should follow that direction.

Sketch the flow in your head, or literally on the model with a light Draw stroke you'll remove later: from the part or crown, down and around the skull, out to the tips. The directions of neighboring clumps should relate — they fan, they spiral, they fall together — rather than each doing its own thing.

Squint at the sculpt until detail blurs. If the clumps still read as hair from three angles, move on; if they read as a lumpy ball, push the silhouette and the gaps harder. Detail never rescues weak big forms.

What brush is best for sculpting hair?

For flow lines on a clump, Rake is the most useful single brush in Re:Form. It drags a comb across the surface, laying parallel tooth ridges that follow your stroke, and holding Ctrl cuts them in as grooves. Carve cuts one sharp groove for the deep splits, and Draw Sharp raises crisp strand edges.

Here's how the brushes divide the work:

Every brush here is broken down in the brush guide.

Step 4: Cut the flow lines

Now, and only now, the lines. Work largest to smallest:

1. Secondary splits. Inside each big clump, cut two or three smaller divisions with Carve or a smaller Crease. These follow the clump's direction and fade out before they reach its edge.
2. Flow with Rake. Run Rake down each clump in one confident stroke along its direction. Use a larger brush on broad clumps and a smaller one near the tips.
3. Accent strands. A few Draw Sharp lines on the tops of clumps, where light would catch individual strands, and a couple of stray locks breaking the silhouette. Few is the key word.

Vary the depth. Uniform grooves across the whole head look machined. Cut deep where clumps separate, shallow on the surface of a clump, and leave some areas nearly smooth — especially where hair is pulled tight or catches broad light.

Mask what you've finished. Masking the face and ears before the Rake pass means a stroke that overshoots doesn't comb someone's forehead. The masking guide covers the habit, and Re:Form's Mask Expand brush spreads a mask along the surface from where you press, which is quick for isolating one clump at a time.

Can you sculpt braids and ropes of hair in Re:Form?

Yes. Re:Form's Blockout tool has a Curve mode with Strands and Twist settings: Strands lays several round strands in a ring along the curve, and Twist winds them along its length, so a single curve becomes a rope or a twisted lock. It's in Re:Form 0.8.6 Alpha, on every plan including Free.

The workflow for a rope-twist lock or a braid-like cord:

1. Pick Blockout, switch the mode row to Curve, and click points along the path the lock takes. Drag while placing a point to pull out handles and bend the curve through it.
2. Set Strands to 2 or 3, raise Twist, and adjust Strand size and Strand offset until the strands part into separate cords or pack tight into a rope.
3. Use Taper end and Taper amount to narrow the lock to a fine tip. Click individual points and change their Size so the lock swells in the middle and thins at the end.

Curves start on Build: Sweep, which builds each curve as its own exact tube: its strands stay apart and the preview matches the finished mesh. Swept curves overlap rather than melt into the rest of the hair, so after Finish, run Remesh when you want the whole hairstyle as one surface — or switch a curve to Build: Blend to melt it in like an ordinary stroke.

For individual stray locks, a plain freehand stroke with Taper start and end set is often enough: a horn-shaped tube that narrows at both ends reads as a curl the moment it's placed. The Blockout docs walk through every control. One limit to know: Strands and Twist are Curve mode settings, so strokes drawn freehand in Strokes mode are always one plain strand. A true three-strand plait, with each strand weaving over and under the others, isn't something the Strands setting produces; build it from separate curves.

Stylized vs. realistic hair

The steps are the same; the ratio changes.

Stylized hair — anime, cartoon, most game characters — lives almost entirely in Steps 1 and 2. Big, graphic clumps with sharp tips, clean gaps, smooth surfaces, and maybe two or three flow lines per clump. Flatten and Scrape the clump surfaces so they catch light as planes. This style is also the most forgiving for 3D printing.

Realistic sculpted hair spends more time in Step 4, with more secondary splits and a finer Rake, but it still starts from clumps. Even photoreal bronze busts are clumps with texture, not strand-by-strand carving.

Either way, stop earlier than feels natural: over-detailed hair reads less like hair than under-detailed hair does.

How many polygons does sculpted hair need?

Sculpted hair needs enough density to hold a sharp groove, which is more than the face needs for the same area. For a bust or a stylized character, a few million triangles is typically plenty. Re:Form's Free plan runs to roughly 12.5 million triangles, well past that; Pro raises the budget to about 80 million.

The practical rule is to block and split clumps at a low subdivision level, then subdivide once or twice before the Rake and Draw Sharp pass. Fine flow lines are the first detail to turn soft and jagged on a coarse mesh; if Rake teeth look stepped, the mesh needs another level, not a different brush. How many polygons you need goes into the numbers in more depth.

How do you sculpt hair for 3D printing?

Sculpt printable hair with deeper gaps, thicker tips and no free-floating locks, then merge it into one closed mesh. Fine flow lines that look crisp on screen can vanish on a resin printer at miniature scale, and FDM loses anything finer than its line width. In Re:Form, Merge all plus Remesh gives the slicer one solid volume.

• Exaggerate depth. Cut gaps between clumps deeper and wider than looks right on screen. Shallow Rake texture often prints as a faint blur.
• Anchor loose locks. A curl that floats free of the head is a snap waiting to happen. Let stray locks touch the head or a neighboring clump somewhere along their length.
• Thicken tips. Tapered points can be too thin to form. Blunt them slightly, or let them rest on the surface below.
• Merge before export. Hair on its own layer, or swept curves that overlap, should become one solid mesh. Merge all in the Layers panel, then Remesh.

Sculpting miniatures for tabletop goes further into feature sizes at 28–32mm scale. Export is OBJ on every plan or STL on Pro; both go straight into any slicer.

Try it in your browser

Re:Form is at v0.8.6 Alpha, so features still change quickly, but every tool in this guide is on the Free plan: Blockout with Curve mode, strands and twist, Crease, Carve, Rake, Draw Sharp, masking and Remesh. It runs in current desktop Chrome, Edge, Firefox, and Safari 26 on WebGPU, with nothing to install, a free sign-in, and no card. It doesn't run on phones or tablets. Open the studio in your browser and start with a head you already have. Selling the result needs Pro's commercial license, at $9.99 a month or $99 a year — the pricing page has the details.

FAQ

Should hair be a separate mesh from the head?

For most sculpts, yes, at least while you work. Hair on its own layer can be hidden to check the skull, reworked without damaging the face, and exported separately for a game bake. Merge it back into the head when you need one solid object, such as for 3D printing. In Re:Form, Blockout puts hair on its own layer automatically.

Why does my sculpted hair look like a helmet?

Usually because it was sculpted as one smooth dome with lines carved into it. Real hair reads through large separate clumps that overlap and cast shadow on each other. Go back to the mass, cut five to fifteen clear divisions with Crease, give each clump its own thickness and direction, and let tips overlap the clump beneath.

Can I sculpt realistic hair strands in Re:Form?

Not as individual strands. Re:Form sculpts hair as solid surface form, which suits prints, busts, stylized characters and game bakes, but it has no fiber or groom system for render-ready strands. For that, Blender's Curves Sculpt mode is free and purpose-built, and ZBrush has FiberMesh. Sculpted hair from Re:Form can still go into those tools as an OBJ base.