Import
SMAAShader is an addon, and must be imported explicitly, see Installation#Addons.
import { SMAAShader } from 'three/addons/shaders/SMAAShader.js';WebGL port of Subpixel Morphological Antialiasing (SMAA) v2.8 Preset: SMAA 1x Medium (with color edge detection)
References:
Properties
.SMAABlendShader : ShaderMaterial~Shader (inner, constant)
SMAA Blend shader.
.SMAAEdgesShader : ShaderMaterial~Shader (inner, constant)
SMAA Edges shader.
.SMAAWeightsShader : ShaderMaterial~Shader (inner, constant)
SMAA Weights shader.