trailFragShader: "\nvarying vec2 vUV;\nvarying vec4 vColor;\n\n#ifdef USE_MAP\nuniform sampler2D map;\n#endif\n\nvoid main() {\n vec4 baseColor = vColor;\n\n#ifdef USE_MAP\n vec4 texColor = texture2D(map, vUV);\n baseColor *= texColor;\n#endif\n\n if (baseColor.a < 0.01) discard;\n\n gl_FragColor = baseColor;\n}\n"