Max, why is the camera exposed when it is changed?

First find an alternative material and render it once. If it is not exposed, it means that it is a material problem.

The ambient light is white, the exposure mode is exponential, the dark part doubles, the bright part doubles, and the gamma value increases, which will expose the scene. You can reduce the values of dark multiplier, light multiplier and gamma in the color map. You can also try lowering the value in the global lighting environment.