Fascinating read, so every planet is going to look different, not just from the lighting perspective.
Very intrigued by the implications of the first paragraph, perhaps its also a building block preparation for things like trees, rivers and seas down the line.
"Where before we had a generator for rocky surfaces and one for ice surfaces which both took Stellar Forge inputs, we now have terrains and terrain materials of various different types and scales which are deterministically selected and blended together depending on the Stellar Forge driven properties of that planet."