Moebius-style (Jean Giraud) NPR post-processing shaders for React Three Fiber and Three.js. Hand-drawn outlines via Sobel filter on depth/normal buffers, crosshatched/tonal/raster shadow patterns, outlined specular highlights with Blinn-Phong. Use when: (1) Adding Moebius, comic, manga, sketch, or hand-drawn outlines to R3F/Three.js scenes, (2) Sobel filter edge detection post-processing on depth and normal buffers, (3) Crosshatched or striped shadow patterns in GLSL, (4) Custom post-processing passes (MoebiusPass + Pass + FullScreenQuad), (5) NPR non-photorealistic rendering stylization, (6) Hand-drawn wiggle/displacement on outlines, (7) Outlined specular via custom Normal material, (8) DepthTexture, scene.overrideMaterial, render-target pipelines in R3F.