matcap_shade — 3D `render` op

• Data kinds: normalmap × image2d → image2d

• Call: import render_shade; render_shade.matcap_shade(normals, matcap) -> 'np.ndarray' (or ops3d.get("matcap_shade"))

Usage

MatCap: map view-space normals onto a lit-sphere texture to transfer a material's look. → `(H, W[, C])`.

Background guides (the physics and conventions behind this op)

• blender_interop — Blender との併用 — 形を作って fullseye で測る(軸・単位・正解データの罠)

References (sample data, literature)

• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).

• Operator provenance and references — the sources of the research/methods this op family came from.

Runnable examples (verified samples that actually call this op)

• render_shade — py -3.11 examples_3d/render_shade.py

Ops the type connects to (they accept `image2d` as input)

fuse_to_voxel · fit_poly_surface · eval_poly_surface · surface_form_error · background_flatten · polar_unwrap · fit_zernike · antialias

Same category (`render`)

project_points · render_point_depth · render_volume_projection · render_shaded · ambient_occlusion · cast_shadow · phong_shade · supersample_mesh

*Provenance: render_shade.py — 3D operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

matcap_shade — 3D render op