Loading non-color maps as sRGB in `StandardMaterial` silently looks wrong

[Noxmore]

What problem does this solve or what need does it fill?

With StandardMaterial, as far as i know any non-color maps are supported to be linear. When creating one with sRGB images (the default) it looks quite incorrect without telling the user why.

What solution would you like?

Log a warning if sRGB maps are used where they shouldn't be. This would've saved me a lot of time tracking this down. (I only ended up discovering why because of the help of @janhohenheim, thanks!)

Considering that glTFs automatically load the relevant maps as linear, what i would really like is if this was done automatically when creating a StandardMaterial, but as far as i know we have no way of know which map a loaded image will be used for, so i think that's off the table.

Additional Context

I was unsure whether to label this a bug or a feature request, i don't mind it being changed if it would be better considered a bug.

[alice-i-cecile]

I'm going to classify this as "Usability", which is kind of half-way in between :)

[janhohenheim]

As a corollary, the same system could warn if a non-srgb was used in the base color, though I don't know if there's a legit use for that that I haven't heard of yet