Matcap
A shaded sphere image wrapped onto any 3D model for an instant material and lighting look, with no scene lights required.
See it
What it is
A matcap, short for material capture, is an image of a shaded sphere. The renderer looks up that image using each pixel's view-space normal, so the sphere's highlight, shadow, and color appear wrapped around any model. The lighting is already painted into the image; the scene needs no lamps. ZBrush made matcaps a familiar way to inspect a sculpt, and Blender's solid viewport shading offers the same thing under its Studio and Matcap lighting options.
Reach for one when you need an instant clay, chrome, pearl, or graphic look, especially in model previews, icons, and stylized web scenes. It is cheap, consistent, and excellent at revealing surface form.
Gotcha: the light is locked to the camera, not the world. Move around the object and the highlight keeps the same screen-space logic, which breaks the illusion in a realistic scene. A matcap also does not create cast shadows or reflect nearby objects.
Ask AI for it
Render this model in three.js with MeshMatcapMaterial. Load a square matcap texture showing a soft clay sphere, set the texture colorSpace to THREE.SRGBColorSpace, and pass it through the material's matcap property. Remove scene lights because the shading is already in the image, keep the background neutral, and preserve the mesh normals so the captured highlight describes the form cleanly.