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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
It also depends on what you want to learn, theres many topics that in a AAA production are made by completely different people - sub topics if you so will: URP and HDRP has public source code for all the shaders, but theres alot of internal Unity Macros that are not well documented: https://github.com/Unity-Technologies/Graphics
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