https://tse3.mm.bing.net/th?id=OIP.fCJwPm8kAFQIdWH9AZ7lWQEsDI&pid=15.1&P=0&w=251&h=168
First, I'm using standard RGB8 textures for my skybox, not HDR. If I use a skybox with an image like above, downsampling it simply gives me a blue tint down my mip map chain. For PBR rougher surfaces, they all just look blue tinted when they shouldn't be.
I was thinking maybe this was because of using LDR textures where the brighter pixels would spread further, and thus making the downsamples brighter. I would think that the clouds wouldn't be so bright to overcome downsampling more to white even as HDR, but maybe that is wrong. Even in a very cloudy day with minimal sun and blue sky, I would think even with HDR that it would just downsample to blue, but it depends on how many bright pixels are clustered and how high their range is.
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