Localized-IBL implementation

@JINTECH very nice :slight_smile:

@Darthlatte I’ll probably try to port it to 4.24 when the time comes, and we’ll see after that.
I don’t think I can sell changes to the core engine, but even then I have no interest in a few bucks (but then have customers entitled to get support). I have other priorities and that’s why I give it away as is, but I’m still up to update it to new versions if it’s useful for enough people