Clean up the AI blockout, reshape it, and lock the silhouette — turning "a blob of mesh" into "a character with intent." This is the first real craft step AI can't do for you. Whether this course is worth taking becomes clear right here.
Picking up from Module 02: that base mesh with the right silhouette but a rough surface and messy topology — now you sculpt it by hand into a real character.
AI-generated meshes share three common flaws: a pitted surface, vague anatomy, and fused-together parts. Sculpting fixes them one by one — repair the big defects, clean up the silhouette, strengthen the anatomy, and split parts ready for the next steps.
Why must a human do this step? Because "does it look good" is a judgment, not a calculation. AI doesn't know your character's shoulders should be broader, the jaw sharper, or the cape more flowing — those aesthetic calls are yours alone to make.
That's also why it's tagged 🐾 Guided: the technique isn't hard, but the feel and the eye are, and those take practice. Blue Cat hands you the workflow and the judgment criteria; the rest is you sitting down and grinding it out.
You can't sculpt AI topology as-is: the faces are wildly uneven, so it tears the moment you pull on it. Do this before anything else —
Rebuild the messy mesh into a new, evenly distributed, sculptable one. Once you're in Sculpt Mode:
Since Blender 4.3, brushes are no longer tucked away in the left toolbar — they all live in the Asset Shelf at the bottom of the viewport:
Grabs vertices and drags them with the mouse. The go-to for adjusting big shapes and proportions — shoulder width, head size, limb length, all of it.
Like a liquify tool: broad, soft deformation without tearing. Better than Grab for reshaping a whole torso segment or stretching a limb.
Pulls faces out into spikes, horns, or tentacles. Great for horns, tails, and cloth tips.
Square brush tip, aggressive, fast at building volume and muscle masses. The number-one workhorse early on — rough is fine, you'll refine later.
The softer version of Clay Strips: builds volume while lightly smoothing, so transitions come out more natural.
The most basic push out/in along the surface (hold Ctrl to reverse). Add small bumps, fill in a little material.
Presses in thin, deep grooves. Carves muscle boundaries, cloth folds, and gear seams. Crease Sharp is even harder.
Puffs out or deflates along the normals as a whole. Makes an area fuller, or fixes a spot that caved in.
Smooths out irregularities — the most-used brush. Note: it shrinks volume, so don't overdo it and smooth the form away.
Shaves faces flat into hard planes; Scrape can even carve a sharp junction. Essential for armor, blades, and machinery.
Sculpt Mode · high-frequency shortcuts
F — brush size (drag, then click to confirm)
Shift + F — brush strength
S / hold Shift — temporarily switch to Smooth
Ctrl (hold while sculpting) — reverse (convex↔concave, add↔subtract)
Ctrl + R — interactive Voxel Remesh
M — Mask brush · Ctrl+I invert · Alt+M clear
Shift + Space — pop up the brush picker (type the name directly)
Ctrl + middle-mouse drag — non-destructive temporary brush-radius perspective tweak
Handle the "hard damage" first, worry about beauty later. AI meshes commonly come with three injuries:
The silhouette is a character's first impression — ten times more important than surface detail. This step uses only move-type brushes to adjust the big shape:
With the big shape locked, start building primary forms (major masses) → secondary forms (sub-structures):
What you hand off to retopo is ideally a clean A-pose (limbs away from the body, easier for flow and later rigging).
Get ready for later assembly and separate processing:
① Grade your forms, big to small. Primary form (major volumes) → secondary form (sub-structure) → tertiary form (skin / fine wrinkles). Never carve detail before the big shape is right — that's the king of rework.
② Don't obsess over the surface; the silhouette is king. If you zoom out to the black silhouette and can't tell who it is, all the pore detail in the world won't save it.
③ This isn't the final topology, so don't fuss over the flow. Sculpting is only about form; messy topo is fine — Module 04 retopo redoes the whole thing. Fussing over flow here = wasted effort.
▸ All three pass → on to Module 04: retopology and optimization (🐾 Guided, the most experience-hungry stretch).