Environment background supports color correction. Support cropping function

Vantage Requests
1

环境背景中使用的大多数hdri地图都需要调整。现在不支持背景颜色调整，非常不方便。希望增加对背景贴图色彩校正的支持

2

Yes, we know about this and it is on our list of things to add in the future.

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