declare const _default: "\nfloat calculateVSM8(vec3 moments, float Z, float vsmBias) {\n    float VSMBias = vsmBias;//0.01 * 0.25;\n    float depthScale = VSMBias * Z;\n    float minVariance1 = depthScale * depthScale;\n    return chebyshevUpperBound(moments.xy, Z, minVariance1, 0.1);\n}\n\nfloat decodeFloatRG(vec2 rg) {\n    return rg.y*(1.0/255.0) + rg.x;\n}\n\nfloat VSM8(TEXTURE_ACCEPT(tex), vec2 texCoords, float resolution, float Z, float vsmBias, float exponent) {\n    vec4 c = texture2D(tex, texCoords);\n    vec3 moments = vec3(decodeFloatRG(c.xy), decodeFloatRG(c.zw), 0.0);\n    return calculateVSM8(moments, Z, vsmBias);\n}\n\nfloat getShadowVSM8(TEXTURE_ACCEPT(shadowMap), vec3 shadowCoord, vec4 shadowParams, float exponent, vec3 lightDir) {\n    return VSM8(TEXTURE_PASS(shadowMap), shadowCoord.xy, shadowParams.x, shadowCoord.z, shadowParams.y, 0.0);\n}\n\nfloat getShadowSpotVSM8(TEXTURE_ACCEPT(shadowMap), vec3 shadowCoord, vec4 shadowParams, float exponent, vec3 lightDir) {\n    return VSM8(TEXTURE_PASS(shadowMap), shadowCoord.xy, shadowParams.x, length(lightDir) * shadowParams.w + shadowParams.z, shadowParams.y, 0.0);\n}\n";
export default _default;