A fair bit considering the state it's in now. I agree there were good intentions with the lighting changes in recent years, but the situation was mainly caused by the lack of availability for the old lights getting to a point where they had to do something. Along with Merlin's energy saving/environmental policies they were forced to move to LED. They attempted to replace like for like, and of course to cope within what were hideously low budgets at the time and so we ended up with the mess we now have. As others have pointed out it is possible to create something decent with LED, but consideration needs to be given to how differently it behaves and to properly look for the right type of lighting. The scenes then may need to be tweaked/adjusted accordingly - again, something that didn't really occur when the current lighting was put in.Genuine question - how much work would go in to getting the lighting 'right'?
We know the original experience was masterminded by a group of people who designed the sets, lighting, everything - but that wasn't maintained properly and through continual tweaking and turnover of staff that knowledge is long gone at this point. I don't doubt the sincerity of those behind the 2018 "TLC" in trying to improve the experience but the reality is what they did made a bad situation worse. One imagines they realised what they'd done hadn't worked as intended but then had no budget to have another go at it.
How do you even do it, is it a case of cumulatively adding/removing lighting and twiddling settings, replaying scenes over and over again for real, or is it done in some sort of CGI version before being set up for real?
I don't think they'd be going so far as CGI renderings etc though. Now that LED lighting is far more established, those in the industry now have a far better idea of how they behave, who is a decent manufacturer and what would be more suited for the scenes they need to light. Again as others have pointed out, it doesn't appear there is a huge budget there to go "all out" on this refurb, but there's enough there (and certainly more than the last attempt!) to have a fairly decent crack at something.