Forma4D: 3D Modeling & Sculpt

Forma4D is a 3D studio for iPhone and iPad. Model, sculpt, paint, rig, animate and render in one app — a scene hierarchy, gizmos and live modifier stacks that work the way desktop 3D software does, in an interface made for a screen you hold in your hands.

MODEL
Start from a cube, ball, cylinder, cone, sheet or 3D text, then stack modifiers on it: subdivision, bevel, array, mirror, solidify, boolean, screw, weld, decimate, displace, lattice, curve, wave, shrinkwrap, bend, twist, taper, shear, spherify, wrap, melt, explode, and an effector for cloned parts. Every one stays live — change its settings or take it off whenever you like. Or open a mesh and build it by hand: vertices, edges and faces, with extrude, inset, bevel, loop cut, bridge, subdivide, merge and dissolve, and selection by loop, ring, linked or grow.

SCULPT
Twelve brushes — draw, clay, clay strips, layer, inflate, crease, flatten, scrape, pinch, grab, snake hook and smooth — with symmetry, radial symmetry, falloff you set, and masks you can grow, shrink, smooth, invert, or take from the cavities and ridges of the model itself. On iPad the Apple Pencil drives it properly: pressure and tilt change the brush as you lean it, and hover shows where it will land before you touch down.

PAINT AND TEXTURE
Paint onto the model's vertices or straight into its texture maps, in layers, with mix, add, subtract, multiply, lighten and darken. Physical materials with base colour, roughness, metalness, normal and emission — or classic, toon and unlit surfaces when you want them. A real UV editor is built in: mark seams, unwrap smart or by cube, cylinder, sphere or view, then relax, pin, pack and tidy the islands over the texture itself.

RIG AND ANIMATE
Add bones one at a time, or start from a biped or a chain. Skin the mesh with weights worked out for you, pose it, and key it on a timeline. Auto key, a graph editor with bezier handles and easings from sine to elastic, and clips that play once, loop or ping-pong.

RENDER
A physically based path tracer that traces light as it really behaves — soft shadows, glossy reflections, true global illumination — on your device's GPU. Up to 4K, with a picture viewer that keeps every render and saves to Photos or Files.

EFFECTS
Particle emitters ready to go: fire, smoke, sparks, rain, snow, dust, trails and bursts, pushed around by force, wind and vortex fields.

IMPORT AND EXPORT
Open OBJ, glTF, GLB and FBX models. Export to glTF, GLB and OBJ for game engines, other 3D apps or 3D printing.

Your work stays on your device. No account to make, nothing to upload.

FORMA4D PREMIUM
Forma4D is a subscription: 3 days free, then weekly, and it opens the whole studio — every modifier, sculpting, painting, rigging, animation, rendering and export, with nothing held back for later. Payment is taken by your Apple account when the free days end, and renews each week unless you turn it off at least 24 hours before the week is up. Manage or cancel any time in your Apple account settings.

Questions, or something not working? Email meliorapps@gmail.com

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