In fact, Apple once did a version of Aqua that did an overengineered materials-based rasterization at runtime, including a physically correct glass effect. It

In fact, Apple once did a version of Aqua that did an overengineered materials-based rasterization at runtime, including a physically correct glass effect. It was too slow and was later optimized away to run off of pre-rendered assets with some light typical style engine procedural code. Feels like someone just dusted off the old vision now that the compute is there.