jtBaseApp/node_modules/@cesium/engine/Source/Shaders/AdjustTranslucentFS.glsl

#ifdef MRT
layout (location = 0) out vec4 out_FragData_0;
layout (location = 1) out vec4 out_FragData_1;
#else
layout (location = 0) out vec4 out_FragColor;
#endif

uniform vec4 u_bgColor;
uniform sampler2D u_depthTexture;

in vec2 v_textureCoordinates;

void main()
{
    if (texture(u_depthTexture, v_textureCoordinates).r < 1.0)
    {
#ifdef MRT
        out_FragData_0 = u_bgColor;
        out_FragData_1 = vec4(u_bgColor.a);
#else
        out_FragColor = u_bgColor;
#endif
        return;
    }
    
    discard;
}