There is a rendering problem, a completely calm water reflection of the reflection of the snow-capped mountains. If the camera movement is rendered, then the reflection of the snow-capped mountains will have many noise, but the snow-capped mountains themselves don't have noise, and the boundary between the water surface and the snow-capped mountains is also shaking. I tried everything that I could try and I didn't solve it. I asked everyone. One thing, when I enabled ray trace everything, the noise disappeared, but the rendering speed was 8 times slower...