For begin i have this:

    if(this.config.map.nightAndDay.enabled == true) {
      this.nightAndDayThread = setInterval(() => {

        if(this.nightAndDayStatus == 'day') {
          this.sky.material.uniforms.sunPosition.value.y = this.sky.material.uniforms.sunPosition.value.y - 15
          if(this.sky.material.uniforms.sunPosition.value.y < 0) {
            // night
            // this.sky.material.uniforms.sunPosition.value.x = -1000
            this.nightAndDayStatus = 'night'
          }
        } else {
          this.sky.material.uniforms.sunPosition.value.y = this.sky.material.uniforms.sunPosition.value.y + 15
          if(this.sky.material.uniforms.sunPosition.value.y > 1000) {
            // night
            // this.sky.material.uniforms.sunPosition.value.x = 1000
            this.nightAndDayStatus = 'day'
          }
        }
        // App.scene.background.setRGB()
      }, this.config.map.nightAndDay.animSun)
    }

But effect is not very representative. Is there any other nice param for update…
Any suggestion?