Technomancer

I have created some working smart baked models, but they all have the same strange bug. In most chunks (16x16x16 chunks, not 16x16 from world height to bedrock) the model renders very dark. The texture is still rendered if you look closely, but incredibly darkly. Every time any block in one of those chunks that is working is changed (even a block not touching the baked model blocks) the chunk changes to be broken. Every time I close and re-open the world, which chunks are broken resets and changes, each time to a seemingly random pattern. Here are a couple of screenshots to demonstrate: And this is the code for the baked model itself: