@Aldo Raine @Uberbok thanks for the suggestions re horrible track shadows. It's interesting that you both have quite different shadow split settings.
I've come to the conclusion that Smart Shadows is either completely broken in 0.3.X builds of CSP, or that some tickbox or setting elsewhere is in conflict with them.
I'm really grateful for what CSP has brought to AC, but I'm also rapidly losing patience with its haphazard and unintelligible nature, especially the way it's pretty much guaranteed that fundamental elements that worked perfectly for years will randomly break between builds, often because of some new feature that nobody ever asked for anyway.
Hopefully AC Evo will free us from this cycle of dependancy on something that has undoubtedly improved AC but always carried the frustration of never really working as intended, and with the ever-dangled carrot that the next build might.. just.. be.. the.. one.. that.. fixes.. everything... when we know deep down it won't. It's hard to maintain enthusiasm for AC when this perpetual loop slowly wears you down.