Percentage-Closer Soft Shadows

PCSS https://gkjohnson.github.io/threejs-sandbox/pcss/index.html
Example 2 https://threejs.org/examples/?q=pcss#webgl_shadowmap_pcss
Nvidia explanation https://developer.download.nvidia.com/shaderlibrary/docs/shadow_PCSS.pdf

• code
• shader
• shadow
• three.js