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filament
Filament is a real-time physically based rendering engine for Android, iOS, Windows, Linux, macOS, and WebGL2
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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.
The filament rendering library from Google has a full PBR pipeline implementation that you can hack on and see where theory becomes practice. It also provides an excellent in-depth discussion of the library implementation as well as why particular choices were made in the library.
NOTE:
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