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Red Blob Games blog, a treasure trove of inspiring posts and tutorials
(www.redblobgames.com)
A community to discuss and share anything procedural generation related, for example game worlds and assets, or simulations whether scientific or ludic.
From Wikipedia:
Procedural generation is a method of creating data algorithmically as opposed to manually, typically through a combination of human-generated assets and algorithms coupled with computer-generated randomness and processing power.