The search term "patched" is the key to this story. RTGI is technically a "Freemium" product. The base version is free, but the high-end features—specifically the Ray Traced Global Illumination and high-quality Ambient Occlusion—are locked behind a Patreon subscription.
While you mentioned a "patched" version for download, it is important to note that supported through the creator's Patreon. Using "patched" or "free" downloads from third-party sites often involves significant security risks, such as malware or outdated, broken files. rtgi 051 download free patched
The 0.51 update was a significant milestone that introduced several major technical improvements over previous versions: The search term "patched" is the key to this story