How to disable post processing for unlit sky sphere

Yeah it’s pretty inconvenient because for example if you want to use a sky photo (for example converting down an HDRI) for the skydome, then you tune that image in Photoshop to the final outlook. But then it’s all washed out in UE, so you need to randomly guess and in Photoshop and oversature it to make it useful. But my biggest problem is that quite often it still won’t match the original.