jtBaseApp/node_modules/@cesium/engine/Source/Shaders/SunFS.js

//This file is automatically rebuilt by the Cesium build process.
export default "uniform sampler2D u_texture;\n\
\n\
in vec2 v_textureCoordinates;\n\
\n\
void main()\n\
{\n\
    vec4 color = texture(u_texture, v_textureCoordinates);\n\
    out_FragColor = czm_gammaCorrect(color);\n\
}\n\
";